My team has just added some fun new characters to Motion Stills for Android. 9to5 Google writes, 

A dog (clear favorite), UFO, heart, basketball, and spider join the dinosaur, chicken, alien, gingerbread man, planet, and robot. The latter six stickers have been slightly rearranged, while the new ones are at the beginning of the carousel.

Enjoy! And let us know what else you’d like to see.