You must have seen the adverts for these!
"Now boys can interact with their new best friend and hard-working buddy--Rocky, the interactive dump truck. Interactive sensors and motorised movement bring Rocky to life--he speaks over 100 phrases, talking and interacting with kids, and even tells jokes. Rocky can also dance, his headlights light up and his rugged design and full-tilting bed are great for manipulative play. Boys will love the interaction and getting ready to load 'em up and move 'em out with hauling and dumping action. When the work is done, Rocky goes to sleep--and guess what--he even snores. "