I have really enjoyed Ocarina (See my previous posts), so I checked out Smule. I found an App called Sonic Boom. It costs $0.99 and is a fun time (and battery) waster. It is a combination of a entertainer and a game. They take the fun of a game and addictive nature of an entertainment App to make a great App. It lets you play around with the settings of a firecracker, then watch it go BOOOOOM! You can adjust things such as the size of the fire cracker and the length of the fuse. You use your finger like a match, then watch as the fire cracker explodes. You can speed up or slow down time. Then, like Ocarina, you can watch other people around the world make explosions.