Particle Toy Available On App Store
Particle Toy is a particle system "sandbox" toy! Play with the color, speed, size, gravity, wind, and direction of a particle system right on your iPhone or iPod touch!
Enable tilt-controlled positioning and real-gravity to move the particle set around the screen or affect gravity by the tilting and orientation of your device.
Your particle system is automatically saved upon exit. Resume where you left off at any time, or start again from scratch with a default particle system by shaking the device.