About This

• Massive 28-Piece STEM Tower for Toddlers This super-sized marble run set includes colorful bridges, large 1.8"" balls, and 20+ ramps and spacers for endless tower designs, encouraging STEM learning and hand-eye coordination.
• Engaging Multi-Tower Design with Bridges Double-hole pink bridges and winding ramps create exciting crossovers from one tower to another, keeping kids entertained and improving problem-solving through interactive play.
• Safe, Durable & Toddler-Friendly Made from strong, BPA-free plastic with ultra-sonic welded balls that are too large to swallow—ensuring long-lasting safety and stress-free play for kids 10 months and up.
• Expandable & Compatible with Ball Drop Series All components are stackable, nestable, and interchangeable with other WEofferwhatYOUwant Ball Drop sets, offering modular creativity that grows with your child.
• Quick Assembly & Compact Storage No tools required. Ramps nest inside each other, making this toy easy to build, store, and take on the go—perfect for busy families who value convenience.