Newton's Cradle model. Nice UI, drag and drop the balls to create motion or use accelerometer.
v2.2.0: Multi-touch support for Android 2.0+ v2.1.1: Donut 1.6 update with QVGA & WVGA support
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Allows an application to prevent the phone from going to sleep.
modify/delete SD card contents
Allows an application to write to the SD card.
read phone state and identity
Allows the application to access the phone features of the device. An application with this permission can determine the phone number and serial number of this phone, whether a call is active, the number that call is connected to, ect.