Attention building site! Enjoy sorting and transporting fun with the colorful dump truck that invites you to learn, play, and move around. Contents include numbers, colors, and tools. The movable tailboard with a lever for tipping out the load wobbles while driving. It features three colored tool buttons and a magic opening that recognizes the balls. The electronic wheel triggers noises, sentences, and melodies, including two sung songs and ten children's melodies (lyrics in the manual) with volume control. The childproof battery compartment ensures safety, and there is an automatic switch-off feature. Two AAA demo batteries are included.