PicassoTiles 105 piece Engineering Kit (SKU: PTN105) comes with a design guide to enable children construct the building blocks at ease. Be an engineer, architect, or designer, this construction block offers open-ended possibilities to nurture children creativity and intelligence, promotes problem solving ability, logical thinking, improve hand-eye coordination, gain strong sense of color, counting, and stay focused by playing to foster STEM Science, Technology, Engineering and Math skills