Steve puts out a regular email where he describes an experiment you can do or a demo. These are usually flamboyant, attention-getting, and the kind your kids will upload videos of you doing. You can also find on his website a list of many of these favorites, along with videos and hints about how to do it and what can go wrong. He is an educator by heart and this is an A+ list to get on.
Up front though, Steve is a businessman and he sells two things – science equipment and himself. Both are quality products and he is not going to twist your arm for a sale – in fact he is the first to tell you that there are cheaper alternatives to some (not all!) of the products he offers. He genuinely wants you to bring these experiences into you classroom and wants to help you do that. But he will cheerfully sell you the materials, too.
Sign up for his mailing list on the link on the right-hand side of his website http://www.stevespanglerscience.com/