Unazukin!

This is the latest toy from Japan, Bandai's own Unazukin. This tiny toy can be a good companion as well. Made to react to your voice, this doll-like thing will nod or shake its head "whenever appropriate". However, the doll nods and shake at its own will, so its rather unpredictable. With 4 different movements altogether, it's battery powered. It could shake or nod its head back and forth once or twice. It comes in white, yellow, red, blue and green. It retails for $12. Affordable.