The THK Deluxe Playset ALIENS comes with some nice 3" tall plastic ALIEN figures. Pictured below are some that I rebased due to a wonky base that always had them falling over.
Alien egg pods.
A brood of rebased xenomorphs. Original bases can be seen in the foreground. Not all were misformed -some stand quite well on their own. Others were very much in need of re-basing.
Let's just pull out and nuke the site from orbit. "It's the only way to be sure."