Bubbles is a light salon piece from the early 20th century, emphasizing a singing tone and sentimental character. Its simple structure serves to highlight the performer's ability to shape melodic lines.
Work on balance between the melody and the delicate, light accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Bubbles is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 2.
You should be comfortable at Henle level 2 — meaning you can already play level 1–2 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 Bubbles lasts about 3 minutes.
Bubbles 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 Broadway Rag by William Conrad Polla, Black Sheep by William Conrad Polla, Buddy by William Conrad Polla — see the full similar-pieces list on this page.