This dinosaurs construction set includes Tyrannosaurus Rex, Centrosaurus, Triceratops and Velociraptor, together with a low speed battery operated toy drill, requiring 2 x AA batteries. There are also two screwdrivers. The drill will automatically stop if it encounters obstacles, so is safe for children to use. The head, mouth, paws and tails of the dinosaurs can be moved. This construction toy can improve hand-eye coordination, manipulative ability, train logical thinking and problem solving-ability. Contains small parts, so not suitable for children under 3.