They were very popular with children. They work fine. However, I'm not sure if they really improve the marble run experience that much. They are definitely not a necessary part of a good marble run.
Educational Ball Drop Activity Toy For Kids - Spinning Swirl Ramp Set For Toddlers And Babies, Safe From 9 Months Up.
42 Review
Advanced Structures For Babies & Toddlers Ages 10 Months And Up - WEofferwhatYOUwant Super Ball Drop With Double Bridge & Spacers!
37 Review
129 PCS Marble Race Track Game - Gifts2U STEM Educational Marble Maze Building Blocks Toys For Kids 4+ Year Old
10 Review
🧩 Пазлы Meland для обучающего строительства
9 Review
CPSYUB Toddler Toys 18 Month Easter Eggs Gifts For 1-3 Year Old Girls/Boys Montessori Matching Educational Color & Shape Recognition Learning BPA Free (12 Eggs)
31 Review
PicassoTiles 3-In-1 Building Block Set: Rocket, Bus, Train Theme For STEM Learning And Early Education - Magnetic, Pretend Play Toy For Kids
32 Review
Набор для детской кулинарии с притворной режущей едой, нержавеющими кастрюлями и кухонными принадлежностями - забавный набор для игры малышей с поварской шапочкой, фартуком, игрушечным ножом и разделочной доской для мальчиков и девочек.
46 Review
Baby Einstein Octopus Orchestra Musical Toy, Ages 6 Months +
41 Review