This little iPhone App was mentioned to me while eating lunch with my child. The waiter said his own son couldn't get enough of it, he would use it in restaurant emergency situations.

With this note I decided to give it a shot. What makes this app great is its simplicity, the child doesn't need to hit any buttons, all they need to do is talk and the little hamster squeaks you back immediately, to the amusement and joy of my kid. You can easily switch between different characters/squeaker types to keep the fun going. 

There are more advanced options, such as recording messages for later but for my 20 month old the immediate feedback is fun enough. The little hamster will make faces as he squeaks heightening the visual feedback.

This little $.99 app should be in the back-pocket of any parent as they head out with their kid. 

http://itunes.apple.com/us/app/smacktalk/id306752436?mt=8

http://www.marcussatellite.com/SMACK_TALK/