We went with our 3 year old son and my 6 yr old niece. I LOVED it and could of stayed longer--we were there for 7 hours easy.

WHY I LOVED IT: they have so many rides for toddlers. Not only are the physically able to ride them, they were NOT scary, loud or assaulting to your senses. My son was able to drive a little car BY HIMSELF! How often can toddlers go it alone.
SUMMER: bring the kids bathing suits: they have a to die for water area. It is has separate areas for toddlers and older children.

I say FORGET Disneyland: I thought it was too loud, and too few rides for toddlers. We are not TV people, so my son had no idea who the characters were.
I CAN'T wait to go back!

I have been here with out of town guests (grown-ups) and they loved it. It was a little hard to keep my 2-3 years old happy, but they have a kids room with "art center" and video, an outside area they can run, a SKATING RINK with the Warm Puppy Cafe next door--we took a break for a snack and were able to watch a "seniors" ice hockey game.
WHAT I REALLY LOVED: they have toddler Mondays once a month for only $5--crafts, snacks, play ares, story time--can't wait to go again!

The summer classes sound wonderful, too, if your local.