This wedge of wood serves as the platform on which you will design and build your Wood Derby Car. Pre-cut, plain pine wood block. Accurately cut axle grooves. You may add a driver figure, spoiler, seat, canopy, steering wheel, decals, paint, or any other details to personalize your entry. Follow the enclosed instructions and use your imagination to make your Wood Derby Car special. 7 in. L x 1 - 5/8 in. W. Height tapers from 1/8 in. up to 1 in.