Feature:1. DIY: 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.2. Walking 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.3. Optical 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.4. Perfect 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.5. Unique 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.Specification:Item Type: Digging truck toyMaterial: PlasticBattery: 2pcs AAA batteries(not included)Applicable Age: Above 3 years old.Package List:1 x Main Block1 x Pen 107 x Plastic Building Blocks1 x Paper 1 x InstructionNote:Children should play under adult supervision to avoid swallowing small toy parts.