Toy Building Blocks - Children's Racing Track: 101 Pieces of Various Track Models, Suitable for Boys and Girls Over 3 Years Old

OverviewThis DIY STEM toy building blocks color and shape recognition, hand-eye coordination, creativity and imagination, motor skills, logical thinking and problem-solving skills, architecture and design skills develop while playing. [Interactivity and extensibility] This is an excellent DIY toy, suitable for adults and children to participate together and enjoy hours of fun with their parents! This classic large-scale construction set is sturdy and durable, with 2-in-1, 3-in-1 and 4-in-1 instructions added to the package, adding more challenges to more units. [Best STEM Gift] The ideal marble running gift for boys and girls over 3 years old.