Ramp up the fun with this musical Marble Run add-on. Arranged in the correct order, these melodious building blocks form a pentatonic scale! Children love to experiment with sounds and tunes.

This Marble Run Add On includes 1 track, 9 building blocks, 6 melodious blocks, 6 marbles

• Ideal for experiments with sounds and tunes
• 6 pentatonically tuned melodious blocks
• Can be combined with all HABA building blocks and HABA ball tracks.