Worx AeroCart

In standard form, the Worx AeroCart is a smooth-rolling wheelbarrow that can hold 300 pounds of sod. Pull a pin and move the wheels, however, and the cart morphs into a fridge-lugging hand truck. But that's only the start of its versatility: A series of attachments also transform it into four other forms, including a cylinder dolly (perfect for propane tanks) and rock lifter. [$180; worx.com]