Today we had our first playtest with children. They are 6 year old and 7 year old. Clarinet and french horn seems a bit hard for them, but they surely had a lot of fun with the Timpani. Based on what we learned from the playtest, we are going to make the other three instruments (French Horn, Clarinet and Violin) more friendly to young players.
You can see where our game was at that moment from the video at below.