The trees on the toys that feature wooden beads that children push along a wire maze can detach exposing a sharp, metal screw, the commission said.

About 500 of the toys were sold nationwide in three styles -- Apple Tree Bead Maze, Cactus Tree Bead Maze and Palm Tree Bead Maze -- for about $13 from August 2008 through October 2008.

Consumers were advised to take the toys from children immediately and return them to the retailer for a full refund.

Consumers can call ImagiPLAY of Boulder, Colo., at 800-882-0217 for information.