Went to do some lab duty a couple days back, did a bunch of reactions with copper hydroxide and observed a rather amusing shade of electric blue after some ammonia was applied, it'd be long to explain the whole process but it was really fun and interesting to learn and do it with my own hands, will surely not blow anything up next time...maybe :3

A gift drawing a friend of mine from the same class did, bestie! (She did not eat the precipitate!)