Lygodactylus williamsi (electric blue day geckos).
With a body language repertoire that includes head bobbing, head shaking, tail wagging, push-ups, lateral flattening, and more, on top of color changes, and the rare squeak, they are amazingly expressive reptiles. Their intelligence seems to be extraordinary as well. They're highly active.
Absolutely the best reptiles for watching, IMO. They'll make you laugh, and entertain you endlessly.