5 Surprise Monster Trucks Series 3 Color Change (2 Pack) offers an exhilarating way for kids to explore color science and encourage imaginative play. By dipping the trucks in hot or cold water, children will engage in hands-on learning while enhancing their fine motor skills through building and customizing their ultimate monster truck. This dynamic playset not only fuels creativity but also fosters problem-solving as kids strategize their racing and battling tactics with interchangeable parts and fireable weapons. 5+ years