I had one when i was 6 or so.

While it was somewhat fun it was best in combination with a cassette deck to record the random noise to make an even worse cacophony.

I learned nothing from it and at some point it disappeared, probably due to my annoyed parents and/or the many note bricks i had lost over time.

I had a Glockenspiel as well and tried to make something from Lego to play it automatically when i was a bit older.

The sound of these "instruments" is still ingrained in my ears and they bleed a little from the memories.