A combination of logic, STEAM principles and a wooden marble run Build towers and tracks to guide marbles in the right direction Includes 20 challenge cards ranging from 'Starter' to 'Expert' Loved by big names: Quadrilla has been praised by The Wall Street Journal as a great way to introduce children to coding as marble runs mimic the way computer programs work. Full S.T.E.A.M. ahead: Quadrilla actively encourages spatial thinking and problem-solving, which are a key part in understanding Science, Technology, Engineering, Arts and Maths (S.T.E.A.M) principles. Develops fine motor skills: As children handle, connect, and arrange the tracks, they enhance their fine motor skills and hand-eye coordination as precise movements are used to assemble the components.