PicassoTiles 105 piece Engineering Kit (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. Picasso Toys STEM Learning Toys 105 Piece Building Block Set Kids Construction Engineering Kit Toy Blocks Children Early Education Playset w/IdeaBook, Power Drill, Clickable Ratchet, Age 3+ PTN105