Top Race RC Robot Kit for Kids 4 in 1 Robot Vehicle Building Toy Kit - STEM Toy includes Build Your Excavator, Motorcycle, Truck or Trailer The Top Race 4 in 1 DIY robots toys is a kids engineering robotic toy for kids. The DIY robots car construction kit set is great for ages 6+ Build your own robotic vehicle toy and Control it with the included wireless remote. The DIY STEM toy kit is of medium difficulty and takes about 35-45 minutes to assemble The kids engineering car kit toy kit comes with easy to follow full step by Step Guide. No Soldering Required. The DIY remote control building toy includes 127 Pieces for 4 Robotic Vehicles, Excavator, Motorcycle, Truck, Trailer. Transmitter uses 2 AA Bat. Motor Uses 4 AA Bat. (Not Included) Ages 6+