My new favorite product is: Squinkies. They are really, really tiny figurines, so you could buy one of each set and they would fit in a pencil case. They just started coming out with "accessories" which makes them great for following directions and basic spatial concepts. Plus, they have sets for most of the "interest" areas for most of my caseload: Cars, Super heroes, Nemo, Disney princesses, Sponge bob, Power rangers, WWF, Toy Story, Barbies among others.
Mainly I've been using for following directions, spatial concepts and answering where questions, but I'm sure there are lots of other ways to use these.