Zig & Go Junior / Racer - 51ピース by Djeco

My 7-year-old spent a whole afternoon building the zigzag ramp course from the booklet, and the wooden pieces fit together perfectly without any frustration. We've already used the instructions to build two of the three designs, and the balls roll smoothly every time.

My kid is 5 and he managed to follow the picture instructions on his own, which says a lot about how clear the designs are. The wooden pieces click together satisfyingly, and he’s already rebuilt the racer course three times without getting bored.