Fun and creativity are the name of the game with our Educational Construction Series, and – true to their name– these sponge tires will add a whole lot more fun to your creations by endowing them with movement that is not only wacky and outlandish, but highly functional too! • Sponge Tire Sheet x1 (160mm x 105mm) • Wheels (Yellow) x4 • 3x100mm Hex Shaft x1 • Double-Sided Tape x4 sheets • The sheet features circular tires (x2), cross-shaped tires (x2) and apostrophe-shaped tires (x4), in blue sponge. • Fit the tires to your model for vastly differing motion, including great climbing ability from the cross design, and lurching, rhythmical movement from the apostrophes. • Each tire design has optional cut-away in the sidewall to let you make them softer as per the needs of your model. • Tires are also compatible with large-diameter size Mini 4WD car wheels.