Buildex Speed Machines Speed Drifter Street Bike Race to the finish line with the Buildex Speed Drifter Buildex toys are ideal for little engineers and young minds Designed to encourage children to develop three-dimensional thinking and an appreciation for construction, movement and design Patent pending construction system called Grid-Lock which allows strong and safe assembly without the need for tools Collect them all and let the challenge begin! Race to the finish line with theBuildex Speed Drifter Buildex toys are ideal for little engineers and young minds Designed to encourage children to develop three-dimensional thinking and an appreciation for construction, movement and design Patent pending construction system called Grid-Lock which allows strong and safe assembly without the need for tools Collect them all and let the challenge begin!