Item Type: Digging truck toy Material: Plastic Battery: 2pcs AAA batteries(not included) Applicable Age: Above 3 years old 1DIY: Digging truck toy is able to be spliced by themselves, not only can you get the toys you want, but you can also get a sense of accomplishment in the hands on process. 2Walking In A Straight Line: If you put inductive digging truck model somewhere else, it is able to only run around the circle until it finds the straight line. 3Optical Sensing: DIY construction truck model toy has an optical sensor that is able to read the black line drawn on white paper to get funny experience. 4Perfect Gift: Electric excavator model toy is the perfect gift for children. It can also be given to family and friends as a surprise at Christmas and Halloween. 5Unique Design: Excavator construction toy is yellow and made of plastic, which is durable and has a long service life, and can attract the attention of others.Children should play under adult supervision to avoid swallowing small toy parts. 1 x Main Block 1 x Pen 107 x Plastic Building Blocks 1 x Paper 1 x Instruction