MORE PIECES - Ramp up the fun and teamwork! Our kits with STEM building toys for girls & boys contain enough balls, wheels, and connectors to go around. | FUN LEARNING TOYS - Foster your child's education with the STEM toy building sets that help boost skills in creative thinking, reasoning, and more. | BOOK OF IDEAS - The kids building toys also come with 42 designs for beginner, intermediate, and advanced builders for hours of educational fun. | SAFE TO USE - These non-toxic, colorful engineering toys are easy to wash and certified Phthalate, Lead, Cadmium, and BPA-free. | GIFT IDEA - The perfect addition to any Christmas gifts for kids, our STEM toys for 5+ year old boys and girls will encourage children to build their problem-solving abilities