How to play Step by Step fix the spare parts with help of non toxic plastic bolts and nuts. To fit the bolts tightly, make use of spanner holding the nuts , given inside the box. Assemble accordingly the whole process & make your Cars-3 set to win fast. Teaches about art of designing and construction. Creativity: Helps creating various models with your own imagination. Teaches & Improves Fine motor skills. Easy to handle & unbreakable. Learns basics techniques of constructing mechanix instrument / tools