I was so excited to get these chemistry themed presents! A copy of Theodore Gray's The Elements with a pull-out periodic table poster, and some glowy Crazy Aaron's Star Dust Thinking Putty with a UV charging light. Thanks, STEM Santa! These were perfect for me! I had a great time taking some photos of the putty in the dark -- it looks much cooler in person, as does The Elements book, which I can't do justice with photos. I also have to mention that my gifter was very far away and I appreciate them mailing this stuff such a long distance.