Attention all little marble run fans! The parts of this Junior marble run are very easy to assemble, so that the extra-large, colourful wooden balls can begin their journey across the construction site. Young motor skill beginners in particular will be delighted during their imaginative play. The exciting construction site elements playfully teach the cause-and-effect principle. It offers expandable and combinable marble fun with a learning and "Aha!" effect! With this marble run, even small children can playfully experience cause-and-effect principles and train their perception of rolling objects. Thanks to the easy-to-grasp design, children are not overwhelmed during play, and the extra-large balls ensure extra safety and fun. The different parts of the play set can be easily gripped and assembled by small children's hands. The familiar plug-in principle of the wooden train offers a variety of construction possibilities and thus stimulates the joy of experimenting and imaginative play. Older children can also let cars or marbles roll on the wooden tracks.