If you’re travelling via Kings Cross St Pancras station this summer, chances are you’ll walk past about 10 metres of yellow and black balls that make up Songboard.

Of course, if you just look at it, you’re missing half the fun. The 3,000 balls can all be moved in half-turns to show either their black or yellow sides and when you flick the right ones around, they make a sound. According to Chloe Meineck, one of Songboard’s designers from Central St Martin’s College of the Arts:

Around 300 of the balls are musical; when turned, the ball sets off an individual section of music, it could be a recording of Big Ben or a musical note. Meaning that songs can also be made with a group of friends playing with the songboard.

Songboard is one of the Mayor of London’s Wonders, part of MoL Presents: A Summer Like No Other. Have you spotted any installations such as the Gifts from the Gods or the Universal Tea Machine at Victoria Park around town this summer? Let us know in the comments below