Rumble Robots were one of the most popular toys to hit the shelves in 2001. While there's no revolutionary machinery involved in their design, they do combine several familiar technologies in an innovative way. The main hook of these toys is their gaming element: Players collect special cards to activate different fighting moves and increase their bot's power level.

Photo courtesy Trendmasters
Trendmasters Rumble Robots

In this edition of HowStuffWorks, we'll look at the various components that make a Rumble Robot work. As you'll see, the basic elements in a Rumble Robot are simply modified versions of common electronic devices we use on a daily basis.