GDN: Edgar is an industrious beaver who’s created a crane to help his dam building abilities. But the items he finds to help dam up the rivers might not be exactly what you’d expect. The dam building pieces take on various shapes, sizes and materials, everything from oblong rocks to used up tin cans and more. Each reacts slightly differently to the rushing current that you need to dam up. On top of that there are switches, magnets, drain vents and even explosives that will help or hinder you on each level.