Left the desk for a few minutes.
Found this once back…
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I had some debrief this morning…
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The kids knew they were the source of music, that each dot is a note and that they can produce different notes with different key (my son has been learning piano for a year now)
The aim of the game was to capture a lonely dot, which seems obvious now that I know it.
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The beauty of it precisely lies in the fact that only one note is staying, giving some musicality to what was a chaotic mess.
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For those less familiar with the OP-1 than my kids, “Tombola” is a note sequencer. I barely used it so far because of its high random factor.
My kids just showed me an interesting way to use it