Kids need to assemble the puzzles pieces in a certain to allow the car to follow the track Hours of Fun & Skill Development: puzzles and vehicles always obsess kids, so this is a great educational toy to keep them entertained and engaged for hours. New Jigsaw Puzzles & Track Car Toys for Kids: this kids puzzles set includes 12 puzzles pieces, 12 road signs, toy cars excavator + dump truck (1 AAA battery required, not included). By building different route, this montessori toys set can enhance kids’ critical thinking, creativity and eye-hand coordination Safe & Durable: the puzzle track play set is made of high-quality ABS plastic and the edges of each piece are carefully polished so that child can grasp it safely.