Keep young minds stimulated with these hands-on learning toys for boys and girls; this 163-pc. building kit encourages logical thinking, problem-solving, and creativity with 2 toy ratchet and 161 BOLTZ building pieces. Use these interlocking gear toys to build create robots, vehicles, towers, and more; launch active engineering and learning for kids ages 3-4 with the included building guide, then watch older kids 5-7 tackle more advanced STEM toy structures. These unique educational toys introduce lifelong collaboration and sharing concepts at an early age; watch kids learn from each other as they make their imaginations come alive with these take-apart toys while honing fine motor skills and hand-eye coordination. These are perfect for kids 3 years and up.