Complete 169-Piece Set for Endless Builds Includes 30 glass marbles, 30 colorful balls, 35 large track pieces, and 66 pink connectors—plus an instruction sheet for easy assembly and tons of creative configurations. Boosts Creativity and STEM Learning Encourages problem-solving, spatial reasoning, and fine motor skills. Perfect for children aged 3+, this interactive toy inspires imaginative play through hands-on learning and design. Modular Snap-Together Design Easy-to-use interlocking parts ensure secure connections while allowing kids to build towers, mazes, or racing tracks—solo or with friends and family for more fun. Safe, Durable, and Non-Toxic Materials Crafted from PP Polypropylene plastic, all parts are sturdy, BPA-free, and designed for repeated use. Smooth edges and compact marble size make it toddler-friendly and parent-approved. Great Gift for Any Occasion Whether it’s a birthday, holiday, or Montessori activity, this marble run delivers educational play and family bonding. Compatible with most small-marble sets for expanded fun. Fuel your child’s curiosity with the WEofferwhatYOUwant Marble Run 2nd Edition – a 169-piece STEM marble track building set that transforms playtime into a hands-on learning adventure. Perfect for kids ages 3 and up, this set combines fun, education, and creativity with a vibrant assortment of 66 pink connectors, 35 large pieces, and 60 marbles (30 colorful plastic, 30 durable glass). Children can construct towering tracks, twin racing lanes, spirals, loops, and even bridge-supported structures using our unique modular snap-together design. Whether building from the included color guide or creating freestyle designs, every setup encourages critical thinking, spatial reasoning, motor skills development, and creative problem-solving. The large round components offer extended "hang time" for marbles, making each run visually exciting and more engaging. The included smaller marbles allow for more complex, faster-paced tracks, encouraging trial and error experimentation — a key part of STEM-based learning. This set is compatible with other marble runs (designed for smaller marbles), offering limitless expansion possibilities for future tower-building projects. Built from strong, child-safe polypropylene plastic, all components are non-toxic and built to withstand energetic, repeated use. The easy-to-handle pieces are designed for little hands to grip, connect, and reassemble with minimal help, giving young builders the confidence to create independently or collaborate with siblings, parents, and friends. Perfect for playdates, homeschooling activities, rainy day projects, or quiet-time solo builds, the WEofferwhatYOUwant Marble Run 2nd Edition provides both entertainment and educational value. Whether you're gifting for a birthday, holiday, or a STEM enrichment program, this set delivers hours of immersive fun and lifelong learning benefits.