Thomé's 'Pièces Enfantines' are delightful miniatures intended for young pianists, offering charming melodies and approachable technical challenges. They effectively introduce children to various musical styles and moods.
Focus on clear articulation and bringing out the cheerful character of the melodies.
20 Pièces Enfantines (op.58) is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 3.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 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 20 Pièces Enfantines (op.58) lasts about 14 minutes.
20 Pièces Enfantines (op.58) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.