ipad programs for kids

[jyap]

I recall there was a thread on good programs for kids but I can't find it now.
My daughter is around 5 yo, and I'm looking for fun educational programs for her to use on the ipad. I would prefer if they are free to download, but willing to pay if its good.

 

[charade]

I like Duck Duck Moose apps. My son is only 1 but there are apps for older kids.