Volume II of the Aves cycle continues the composer's exploration of limited-range keyboard colors. The piece is distinguished by its focused, pointillistic approach to melody.
Control over consistent touch is essential due to the lack of dynamic range on the instrument.
Comparable difficulty and character — good candidates for what to learn next.
12 Preludes for Toy Piano - Aves 鳥 vol.II is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3.
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 12 Preludes for Toy Piano - Aves 鳥 vol.II lasts about 1 minute.
12 Preludes for Toy Piano - Aves 鳥 vol.II 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 12 Preludes for Toy Piano - Aves 鳥 vol.I by Kazue Rockzaemon Isida, 12 Preludes for Toy Piano or Celesta - Aves 鳥 vol.II by Kazue Rockzaemon Isida, 12 Preludes for Toy Piano - Aves 鳥 by Kazue Rockzaemon Isida — see the full similar-pieces list on this page.