make them eat each other
According to IMDB it is simply "Green Aliens".
Toy Story 3 Aliens (voice) by Jeff Pidgeon (IMDb.com)
No
yes
es
They're usually battery operated.
You're kidding right
They dont grow!
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.
Toy Story Treats - 1996 New Aliens on the Block 1-30 was released on: USA: 1996