Here are some pics using my usual diffraction gratings, mirrors, and a beam splitter I just got. I must thank Bionic Badger for his post about making me aware of the sale of these Beam Splitters from Surplus Shed. For 21 dollars they are a steal and pretty neat. Enjoy.
Lovely weekly show! Glass ball in a glass cup, not bad at all. The laser web background is simply stunning to look at over and over again. Regarding the materials you've used for this session, I own a similar shaped glass block/cuboid, but with a laser engraved dragon inside of it (would prefer a clear one though).