Caleidoscopio (カレイドスコーピオ) is a folk compilation album sung by Kagamine Rin and Kagamine Len. It consist of 18 tracks featuring tracks such as "Ophelia", "Hikari", and "Dideh o Shasta -the 15th bouquet-". With composers such as Lelele-P, Uta-P, and Orebanana-P. And with illustrators 7:24, △○□×, Nazekorewo-P and more.

It was first distributed in VOC@LOID M@STER 19. A mylist of the uploaded songs can be seen here and crossfade of the album can be heard here in Nico Nico Douga. The album was purchasable from Toranoana, however, it is currently sold out.

Their official website can be seen here.

Caleidoscopio Album Cover
Released January 8th 2012
Producer Various
Price 1,000 yen
Illust. Soriku
Track list
1. 生きた花の詩
Maharo ft. Len, Rin
2. 祭りの伝承歌
Enikusu-P ft. Len, Rin
3. トコニレの森から
Sasasa-P, Chie-P ft. Rin
4. 流れ星になって
Tsukino-P ft. Len, Rin
5. 想色小瓶
Sumimasen-P ft. Len
6. 煉獄
Shiruo ft. Len, Rin
7. ひかり
Akahori ft. Len
8. オフェリア
Lelele-P, Orebanana-P ft. Len
9. 螭吻~Chiwen
a_denial ft. Len
Sasasa-P ft. Len, Rin
11. Dideh o Shasta -十五の宴-
Nanami-P ft. Len, Rin
12. .florist
Castella ft. Rin
13. 少年の旅立ち
Harumaki-P ft. Rin
14. 情熱のカンテ
Saku-P ft. Len
15. そして夜毎に君を待つ
innisfree ft. Len, Rin
16. オオカミ少年の最後の嘘
Kid-P, Crystal-P ft. Len
17. Sol Dios
Uta-P ft. Rin
18. Fractus
Uta-P ft. Len, Rin