Vermont Philharmonic presents its annual family concert alongside the up-and-coming instrumentalists of Green Mountain Youth Symphony. This year’s program highlights works that famous composers developed when they were around the age of the GMYS players: a selection from George Frideric Handel’s first opera, Almira, which he composed at 19; the “Minuetto” from Wolfgang Amadeus Mozart’s Symphony No. 8, composed at 12; and the “Andante” from Felix Mendelssohn’s Symphony No. 1, composed at 15, among other works. The orchestras also perform pieces by Callum Robechek and Chase Ehrlich, two young composers from Montpelier High School.