Henri Kowalski's Bajeczka is a charming 19th-century salon piece. It displays typical romantic idioms such as cascading arpeggios and light, ornamental melodic figuration.
Students must master the delicate balance of the right-hand fioritura and the rhythmic accuracy required in the light accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Bajeczka (Op.64) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Bajeczka (Op.64) lasts about 4 minutes.
Bajeczka (Op.64) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Bajeczka by Henri Kowalski, 12 Variations on 'La bergère Célimène' by Wolfgang Amadeus Mozart, 12 Variations on "La bérgere Célimène" by Wolfgang Amadeus Mozart — see the full similar-pieces list on this page.