Kids who want to participate” cannot be determined, most times, in one year. Most students WANT to start studying an instrument, and then their interest wanes for many reasons — least of which is “they weren’t meant to play an instrument".
This is a great letter on the value you, as a parent, plays in the role of your child learning an instrument and playing music within a band. Definitely worth a read!
Over 50% of students quit their musical instrument within the first two years of playing. Here's some tips to overcome that.