Race Car Building Toys, MOC Racing Building Blocks Super Sports Car for Teens and Adults, STEM Toy Racing Car Building Block Set Compatible with Lego100% Satisfaction Guarantee: We are committed to providing the best customer experience possible. Our building brick kit is packaged and sold after being checked by the machine several times, so you can be sure that you're getting a high-quality and safe product. If you find some missing pieces in your item, please show us what pieces are missing, and we will ship the missing pieces to you for free.