Melissa and Doug Stacking Construction VehiclesVroooom. This set of three construction vehicles is made of quality wood with 15 pieces that can be taken apart again and again for hours of fun. Your little construction worker will love playing in the sand with the cement truck, dump truck and bull dozer, and you will love how these chunky, rolling vehicles help promote hand/eye coordination and motor skills. The bold colors and designs also help children develop early shape, color, and size differentiation skills. For added fun, pair this set with Melissa and Doug's Stacking Emergency Vehicles.