The WOW Toys Mack Monster Truck encourages the development of motor skills along with the experience of cause and effect. When your child pushes down the engine block, Mack's enormous mouth open revealing his scary monster teeth! This interactive toy allows toddlers and preschoolers to flip up the roof to put the driver into his seat then it's go-time! No batteries are needed for this two-piece set that includes the motorised Push and Go monster truck and driver Play Friend. Inspire your child's imagination and promote creative play with this safe toy that is BPA and PVC free with no small parts that could be swallowed. It's easy to clean and dishwasher safe!