390-piece set Includes: 390 Parts, 3-volt Electrical Motor, 2 Real Tools &1 Instruction Sheet Let your child build 1 of 25 different construction vehicles (models can be built one at a time) Promotes children's STEM (Science, Technology, Engineering, and Math) learning as they build and play Mountain Rally Racer measures 9.75" long x 5.0" wide x 3.5" tall