Description ▸ 2012 Editor's Choice Award! - Children's Technology Review▸ "a fun, educational app that hits the mark with kids" - The iPhone Mom Monster Physics™ is a unique building app that lets you play with physics! Build and operate your own car, crane, rocket ship, plane, helicopter, tank and more!
BUY $.99 https://itunes.apple.com/us/app/monster-physics/id505046678?mt=8&uo=4