Well done, Richard. On reflection, not a fantastic puzzle as there are so many alternatives, but I don't want to detract from Mr Barrett's glory.
It was a youthful theme...
Here are some of my line-up:
Tchaikovsky - Album for the Young, Op. 39
Janacek - Mládí (Youth), suite for wind sextet
Rachmaninov – ‘Youth’ Symphony
Elgar – Dream Children or Nursery Suite or The Wand of Youth
Coates - Joyous Youth Suite
Kabalevsky - Piano Concerto No. 3 in D major ("Youth"), Op. 50
Extra points would be awarded, if we did the whole points things (which I have no intention of doing!), for other youthful examples. (I had nine more composers on the subs' bench...)