The Wonder Place — Little Rock, Arkansas — http://thewonderplace.com/  
From their website: "The Wonder Place isn't simply a destination.  It's a place that encourages imagination.  A place where your child can dream, wonder and explore.  It's a unique, creative play experience designed just for kids 8 and under."

"In The Wall" — small machine 3 feet x 5 feet x 10 inches deep.