I finally arrived in the 21st century and bought an iPod Touch. I really don't listen to music so not sure why I bought it. I saw a few apps that I thought would be good for the boys to practice their math. I have since found a few others. My 7 year old loves an app called Pocket Frogs. My 8 year old loves Let's Golf. So here is my questions for you all. What apps do you guys like? Which ones are must haves and which ones are a waste of time?