'A Passing Fancy' is a charming character piece, likely with a light and fleeting musical idea. Its distinction would be in its elegant melody and perhaps subtle harmonic shifts that capture a momentary impression.
Maintain a delicate touch and use subtle phrasing to convey the ephemeral nature of the piece.
A Passing Fancy is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A Passing Fancy is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.