Happy Cotton is a super fun DK cotton yarn from Sirdar that comes in 50 happy shades from pretty pastels to cheerful brights. The yarn comes in 20g balls so is perfect for fun arigarumi crochet projects. There are ten Happy Cotton Books to accompany the yarn with different amigurumi projects.
This is 'Book 1: One Shape, Two Ways' and is eight convertible charactors to crochet.