1) 1994: Earth Buddy
These small sacks of dirt that sprout grass were such a craze that Spin Master turned to Toronto's homeless population to help fill orders.
2) 1998: Air Hogs
The technology powering these miniature planes is so sophisticated, nearly one-quarter of collectors are adults.
3) 2004: Aquadoodle
This toy lets kids draw in multicolor disappearing ink using only water. It's one of the best-selling preschool toys in the U.S.
4) 2006: Tech Deck
Spin Master pioneered the action-sports toy category — to the ire of middle-school teachers everywhere, who list it as the most-confiscated toy.
5) 2007: Bakugan
Magnets turn plastic spheres into these intricate action figures, ready for tournament battle.
A version of this article appeared in the April 2010 issue of Fast Company magazine.