Here's how to really get them going! An easy press on the drivers of the dump truck or cement mixer produces engine revving sounds before they take off across the floor for the tots to chase. After stopping, they both play exciting music to encourage more pressing & going. The chunky 7 1/2" L. x 6 1/4" H. x 4 1/4" W. vehicles also work as freewheeling toys. Set of 2. Ages 12 mos. +.