Trampoline

Or if you're Sage- it's called the "bouncy!"
And she looooves it.
It's a birthday present from Nana and Big Daddy.
It took mommy about 3 hours, a nap and an Advil to put together.

She is checking out the entrance/exit:

 Hilarious!

 Bouncing in her bouncy!

Trampolines are also good for spinning-but then it's hard to bounce and it takes a few seconds to adjust and get back up!