【Creative Engineering Design】8 in 1 mechanical engineering includes 336 pieces, designed with 9 styles. Kids can play with educational building toys by following the instructions or use their imagination for creative themed products. Buy 3 sets if you want to get 8 styles EDUCATIONAL STEM TOYS: This construction science set is a good toy for kids to learn the basic principles of construction machines. Enhance your child's hand-eye coordination and problem-solving skills and inspire their creativity. 【Safe & High Quality Material】Building toys made of non-toxic and durable ABS plastic, durable with smooth polishing, comfortable to hold, safe to touch. It will not scratch children's hands. 【Fun Game】Popular creative toys for children in home activities, classrooms, etc. By playing these building blocks, children can acquire a strong sense of color and geometric shapes including 3D shapes, number counting, hand-eye coordination, geometric design and logical thinking at an early age.