142pcs Marble Run

*Great item to teach about momentum and properties of gravity through the marble running in the track. *Set of blocks can improve hands-on ability, creativity, exploring capability, hand to eye coordination, color discrimination, and sparkle their imagination. *Colorful and beautiful appearance can stimulate the brain and thought of kids. *Plastic building pieces are of high quality, durable and easy to build. *This marble runs will amaze kids *Endless possibility to build what kids want *Build up a positive relationship. *Including comprehensive components like merry-go-rounds, U-turn slides, S-curves.