SLINKY-Zoob Mobile Racer Set: Racer. A building set with a difference! The pieces move after kids snap click and pop them together. Kids can play with their ZOOB creations instead of just looking at them. This package contains thirty-seven ZOOB pieces and complete instructions for creating nine different models in one 9x11-3/4x2-3/4 inch box. Recommended for ages 6 and up. WARNING: Choking Hazard- small parts. Not for children under 3 years. Conforms with ASTM F963. Imported.