You could kill a few people and embalm them perhaps, with that formalin. Mummies would make a great front door decoration

If you have any CuSO4, you could play around with copper complexes. I did when I was self-teaching (I still am self teaching mind you, doubt I will ever stop...one can always lean more)

Simple addition of CuSO4 to NH4OH will produce the tetraminecopper (II) complex, other salts can be used. The chlorate was fun, a moderately sensitive primary HE, pale turqoise-blue crystalline compound, resembling flowers of sulfur in appearance when it was produced. IIRC the nitrate was greenish.  Never did succeed in isolating a peroxide, but that wasn't really a subject of much effort, just casual childhood experimenting really, and it wasn't tried with highly concentrated H2O2 or sodium/potassium peroxide.

You could always (carefully) try the classic experiment with iodine, making nitrogen triiodide by addition of ammonia.
That should be done VERY carefully, in small amounts, as it is very, very unstable, doesn't take more than a slight vibration or touch to set it off with a loud bang and decomposition into iodine fumes. It is of no use as a practical explosive though, as it is too sensitive and could never be picked up to pour into a detonator, let alone packed in, sealed, or transported.

Don't bugger about with the equivalent trichloride though, careful addition of Cl2 to ammonium nitrate solution, there is a 'barking dog' lab demo that can safely be performed with it, but anything else, well, not good. It will take your head off, given half a chance, the barking dog demo is done in a test tube, creates nitrogen trichloride in tiny droplets, which explode with a flash of light as soon as they are formed.

Thermite is another simple, and quite useful one, a mixture of a metal oxide and aluminium powder, although very hard to ignite (I have held a blowtorch to a lead oxide thermite, and it took several minutes before it got hot enough to ignite. A magnesium strip stuck into it will do it, but I prefer a mixture of permanganate and sugar, or chlorate and sugar, mixed with NaCl at around 40-50% the weight of the chlorate to dampen the burn rate, and make it a slow burning incendiary rather than anything thats likely to go off with a bang (and disperse the thermite where it isn't wanted)

The classic mixture is Al and iron oxide, the aluminium acting as a powerful reducing agent, and scavenging the oxygen from the metal oxide, giving an alumina slag, molten metal, and intense heat. Thermite can be used for casting, for obtaining various metals from their oxides, for cutting metal, or of course, for obliterating things that piss you off. Remember though, once it gets started and the thermite is lit, it is NOT going to be put out until it burns itself out. It will split CO2 from a fire extinguisher and just get supplied with a burst of oxygen, although its capable of burning in anoxic environments, as the reaction supplies its own O2. It will burn under water, splitting off H and O, and do very unpleasant things to halocarbon fire extingisher discharges, doesn't take much of an imagination to figure out hte sort of nasty things that could come from a bunch of fluorinated halocarbons (halons) at temperatures of a couple of thousand degrees C.

So, don't light it, if you figure you might not want it burning, as you won't put it out by any means. AFAIK, even dumping sand over it, would just result in the sand fusing to a glass.

Copper thermites are a bit different to most, and apparently, although I have never done it, will go off with a flash and explode, even when unconfined.

I have read interesting things about nanothermites also, there has been a lot of research done into molecular nanocomposites, where instead of merely ground up Al and an oxide, the aluminium atoms are coated with fine layers, on the nanoscale, of oxides, these burn much faster, and more intense, the papers are around if you look online as for the preparation of such nano-thermites.

Don't search for 'nano thermite' though, that will come up with a metric arseload of 9-11 conspiracy discussions, use the term 'metastable intermetallic composites' instead to come up with the actual research.

I want to go to oz myself, some time.

Go bug hunting....I want a mouse spider for a pet, although I think I am going to have to settle for a scorpion instead. I have a tank by my computer table, that just needs cleaning out, then a desert habitat, with sand, some plants, and some rocks for a pile, that the critter can hide in and make itself at home. Need a heat mat for the far side of the tank too.

Going to get one of the Parabuthus spp. Probably P.transvaalicus, the south african fat tailed spitting scorpion. Notable for its ability to fire a stream of venom like some cobras, or the mangshan pit viper can.

As for the jellyfish, how effective such a weapon, based on jellyfish venom would be, depends entirely on the species harvested. Dead jellies can still sting, so cruelty to the living creatures can be avoided entirely.

Chironex fleckeri would be the ideal species-lots of large tentacles, and a veritable shitload of nematocysts to harvest. I believe the best way to obtain the venom, would be dialysation across a permeable membrane, there is some research done on that, where they aim to characterise the venom fraction of the jellyfish. I think the cells could effectively bee lysed to free the venom from the unfired nematocysts, without damaging the delicate venom, as they are heat-sensitive proteins, either by use of a protease, potentially, but one would have to read up on the nature of the venom, before deciding on a suitably selective protease, to lyse the cell tissue, without damaging the venom within.

Something like sphingomyelinase-D, would work on mammalian tissue, I'm not sure what the flesh of jellyfish is composed of, it may work it may not. Could be obtained from a spider species that is available in the exotic pet trade, a relative of the notorious brown recluse spider...Sicarius spp. such as S.hahnii or S.terrosus. Sicarius, meaning 'assassin' is a sister genus to Loxoceles, but produces a massive quantity of venom, relative to the recluses.

A bite from one of those buggers is likely to kill, no antidote exists currently, they are usually peaceful spiders, but if aggravated can get pissy. The venom would melt flesh, a couple of reports of bites exist, one guy died, another lost an arm. Toxicity is quite likely equal to that of a puff adder, or saw scaled viper.

Alternatively, and likely easier, would bee to freeze the tentacle samples, and thaw them quickly, filter mechanically, dialyse the venom, carefully, in buffered saline, then use electrophoresis to purify it, prior to incorporating it into some form of covert delivery device. I wonder....if such a protein as the cardioactive fraction from Chironex venom would be too big to be delivered transdermally in DMSO?

http://www.sciencedirect.com/science/article/pii/S004101010700462X Partial purification of the haemolysins from Chironex fleckeri venom

The cardiotoxin would probably be the best practical fraction to use, its extremely potent, capable of killing within a couple of minutes. It is extremely thermolabile, however, and I just read, that freeze-thawing damages it somewhat, Sonication, and manual grinding in a mortar and pestle seems to work, to produce a very crude venom extract, when done under phosphate buffered saline. This could, I think, then be dialysed and purified via electrophoresis in PBS.

http://www.ncbi.nlm.nih.gov/pubmed/11199528

http://www.ncbi.nlm.nih.gov/pubmed/8105563 A non-lethal method of venom collection via electrostimulation of sea anenomes, I imagine it would work on jellyfish also.

There are a lot of marine biotoxins with extreme potency, palytoxin might be one to go for...zoanthid corals of the genus Palythoa are available in the marine pet trade. Some people have had problems with them while transfering the zoanthids to new habitats, or if one is wounded, and someone is then exposed to the water, either directly, or by aerosol inhalation.

Palytoxin is about as lethal as you can get, it operates on sodium/potassium  pump proteins and forces an open state, frying the ion gradient of pretty much all cells, binding to Na+,K+-ATPase and actually changing the transporter protein into an ion channel. Amazing. And deadly. Palytoxin is an extremely potent vasoconstrictor, a lethal dose for a human, apparently, is likely to between 2-60ish micrograms, injected IM or SC. 2ug is likely, via aerosol to produce toxicity.

Symptoms are rhabdomyolysis, and an acute heart attack, caused by constriction of the aorta, mycocardial damage is likely also if the victim survives for more than a few minutes.

Nice reply nk, thanks! I have actually thought about the styrene from cups before and not long ago actually. I do have chloroform and lots of cool solvents n such. I also have about any glass someone with my experience level would be expected to have, maybe even more. Hmmm, hexamine.....

Thanks guys. Don't hesitate to add more if you think of em!

You realize I own a moped, right? I aint afraid to ride that fucker to Australia.

Did you happen to notice what the guilty looking bugger was upto? odd to see the filth buying anything there. Bet the hypocritical ratbastards were making something similar themselves. Hopefully at least one of the bottles was fluoroacetate, or something equally horrid, and I sincerely hope they choke to death on it, whatever it was.

I've had a lot of fun crafting ways to prepare ionic compounds in my early days(which I am just now stepping out of). Cu(ii)(C2H3O2)2 was a fun little one to figure out! Fe(ii)SO4 was a little tricky as well(also forms a cool metal complex with ammonia). Those were two very valuable inorganic excercises I did OTC, by my own means(which were used in organic experiments later). Looked up a proper procedure AFTER completion. Doing that was critical, and I made a ''better'' method than the books was a rewarding feeling(at least for the one Fe(ii) compound). Some people do soduku's, some people play with chemicals hehe.

Or some basic organic reactions(what everyone is most interested in :p). Though it's always scary to suggest organic reactions and preparations to people that are new to the arena. It can be dangerous. Sulfonation of toluene to make TsOH was a good one and a useful reagent, basic esterifications(ethyl sulfate, etc), Distillations, etc.

Basically prepare reagents(for later), and purify otc compounds that interest you. Thats where I started and I think I'm doing okay.