According to IMDB it is simply "Green Aliens".
Toy Story 3 Aliens (voice) by Jeff Pidgeon (IMDb.com)
es
yes
No
make them eat each other
Toy slime aliens can be used for various fun activities, such as sensory play, stress relief, or as a unique desk toy. They can also inspire imaginative play, allowing children to create stories and scenarios involving the aliens. Additionally, slime aliens can serve as party favors or themed decorations for events, adding a whimsical touch to celebrations.
They're usually battery operated.
You're kidding right
Toy Story Treats - 1996 Drawing Aliens 1-32 was released on: USA: 1996
Yeah, the Space Aliens grow in the dark, but you charge them in the light :)
They have one each.