This could be a fun science fair project someday :) Ants stomachs are transparent. a woman noticed it when ants drank/ate spilled milk one day so she gave them some colorful candy and then photographed them!
DIY Amazing Density Tower from Things Found in Your Kitchen by stevespanglerscience: Make objects float in the middle of a liquid with this amazing trick. The idea is cool, but you need a tall glass (a vase?) and lots of each liquid to make it look good.