She's the perfect miniature version of the full size baby Tumbles Surprise.
You can see my post on the full size Baby Tumbles Surprise HERE.
Teeny Tiny BTS is only 3 1/2" tall,(and that's only if you stretch her legs out straight.)
She was made by Toy Biz in 1996.
She works exactly the same way as the larger version. She can't sit up without falling over and ending up on her head.
Tomorrow we'll see another full size doll.