juvenilia
Works produced during an artist's or author's youth.
[…]rhyme was not his talent; he had neither the ease of doing it, nor the graces of it: which is manifest in his “Juvenilia” or verses written in his youth, where his rhyme is always constrained and forced,[…].
Where it comes from
From Latin iuvenīlia, neuter plural of iuvenīlis (“of or pertaining to youth”). By surface analysis, juvenile + -ia
Adapted from the Wiktionary entry juvenilia (CC BY-SA 4.0).