This marble run system from Haba is all about versatility and play value. It is the starter set that forms the basis for all Haba ball track systems. There are 42 beech wood pieces in the set which includes marbles, blocks, direction changers, bridges, ramps, bell and a very funky zig zag track. Like all Haba building systems the pieces are all based on a 4x4x4cm cube, meaning it is compatible with Haba building block sets. Just think of the creations you can come up with! Age guide: from 3-10 years according to the manufacturer, however we think adults and grandies will also love this.