I saw this door on 4th of July weekend at Walmart. I almost bought it, but then thought "ahhh, does it really work?".
Well, Auntie Collette had one at the cottage. Not only does it work, but it's super fun. For Grey anyway. And yesterday, for 14.99, I bought my own for the screened in porch, since the kids struggle to keep the door closed while running in and out.
Check out Grey's hilarious moves:-)