Marach on 29 March 2018
So, Nintendo just release a FAQ on Nintendo Labo.
https://t.co/jZm7B3dVKS
It confirm that yes you could buy additional cardboard sheets, but they also try to push the idea that you dont need to very hard. First, you can repair cardboard pretty easily, and they suggest several time to keep the original cards once you remove the pieces from it to copy them on a regular cardboard and make your own replacement parts.
it also show that the piano come with card that you punch holes (or fill holes if you want to change the card function) that are call waveform and rhythm cards.
