Hop n Play is a play space inside the Tanforan mall (next to Target). What is really cool and unique about this place is that there are moving playthings. They have a marry-go-round type rotating toys that children can climb onto. They have an inflated seesaw that goes by itself. It's really gentle and your toddler can ride it all by themselves and without much coordination at all. There are a 3 story high climbing house, a tunnel, and mini platforms - and yes, they all rotate. There is a small balloon room (my children call it the crazy balloon room!) with fans that move the balloons all around. Definitely a cool place to check out. Also, they have two party rooms for your birthday parties. I didn't have my camera with me (gasp!) so here are a few iPhone pix.
Hop N Play
1150 El Camino Real, Ste 142, San Bruno, CA 94066