According to Josh Briggs, Tappy Tunes, Bookworm, Tic Tac Toe Free, Build a Robot, Pegs, Animatch, SpinArt, Balloonimals, Wacky Safari and Wheels on the Bus are cool iPhone apps for kids. Briggs listed these in his 2010 article published on the HowStuffWorks website.
Tappy Tunes is a musical app in which kids choose one of 80 songs to play and try to match the perfect tempo of the song by tapping. In Bookworm, kids link letters to form words. Tic Tac Toe Free is a free mobile app version of the popular children's game. Build a Robot allows children to explore their creative side as they build robots by selecting arms, legs, head, body and facial features. Pegs is a free app of the peg game frequently seen on restaurant tables. AniMatch is an animal matching game for toddlers. SpinArt allows kids to create colorful art on a spinning canvas. Balloonimals allows kids to create balloon animal shapes by shaking the phone. Wacky Safari is a puzzle app for toddlers. Wheels on the Bus is an interactive app that allows kids to see movements and sounds from various parts of the bus by touching them. Most of these apps have paid and free versions.