SimplePhysics – Amazon Appstore for Android – Free app of the day

Design complex structures for everything from tree houses to Ferris wheels and simulate your design with a sophisticated physics engine! Your design must be strong enough and cheap enough to win. The new Bomb Shack level includes a dummy with full support for ragdoll physics. Compete worldwide!

Get it here
http://www.amazon.com/mobile-apps/b/ref=topnav_storetab_mas?ie=UTF8&node=2350149011
http://www.amazon.com/gp/product/B007TMON8M?ie=UTF8&ref=mas_faad