101 PIECES - The more the merrier! Our educational toys set has enough blocks, wrenches, moveable wheels, nuts, and bolts for up to 4 / 6 kids at one time. | LEARN & PLAY - Let your kid's creativity and imagination run wild! These STEM toys are ideal for a 4 year old, but provide educational fun for all ages | BOOK OF IDEAS - Spark the creative genius in your child with 42 designs for beginner, intermediate, and advanced builders in our tinker toys guide | SAFE TO USE - These bright, colorful, non-toxic building blocks for kids ages 4-8 are certified Phthalate, Lead, Cadmium, and BPA-free | GIFT IDEA - This holiday season, give the gift of learning! Our STEM toys for 5+ year old boys and girls are designed to help boost problem-solving skills, social skills, and more