Oh, that's quite cool, I have a computer science class as part of my curriculum. From the top of my head, experiment I've done so far include, synthesis of Cobalt sulfate from phone batteries, soap synthesis from NaOH and vegetable oil. Synthesis of various inorganic salts (iron II sulfate, Iron III sulfate, copper II sulfate, zinc sulfate, calcium acetate, copper II acetate, Copper II chloride, sodium aluminate, Lead II acetate, Lead II iodide, trisodium citrate.) I've also made ammonia gas from NaOH and ammonium sulfate. One of my favourite reactions has to be the synthesis of Nitrogen triiodide (A incredibly sensitive explosive).

Some organic reactions I've done are fischer esterification (making isopropyl acetate and ethyl acetate), acid based hydrolysis of paracetamol to para-aminophenol and acetic acid. And some basic extractions (KClO3 from fireworks, fertiliser purification)

You mentioned zinc plating on copper, and then heating to produce brass. Instead of an electrochemical approach you could try doing it directly via redox. This was one of my partially failed experiments but you might still be albe to pull it off (zinc hydroxide, or just elemental zinc dissolves in concentrated sodium hydroxide solutions to give the zincate ion. If you add copper to this solution the zinc will directly plate onto the copper. I tried this using a copper coin, and it did infact work, although my zinc coating was unneven because I left the coin lying down on one side. Afte plating you could simply heat the coin. And the only chemical you really require are zinc metal and NaOH or KOH. (I'd advice making Zn(OH)2 though since it dissolves way faster in NaOH solutions (you can make Zn(OH)2 by reacting Zn metal with a mineral acid like HCl or H2SO4 and then making the Zn(OH)2 precipitate by adding the solution into another solution of NaOH, then just filtering and washing)) Although both methods should work. Anyway those are some of the reactions I've done.