Quadrilla An educational toy that allows for endless assembly with wooden parts. - Brand: Quadrilla - Model Name: Twist & Rail Set - Age Range: 4 years and up - Material: Wood This is an older item, but it's still in usable condition. However, two parts are missing, and the marbles have been lost in other play. See photo 13. It has been used for a long time, so there is some color transfer from the colored parts to the wooden parts. The outer box has been reinforced with tape, so please check the photos. #Wooden #EducationalToy #PythagorasSwitch (Japanese TV show featuring marble runs) #TwistRail #Toy #Fun #KidsLoveIt