Use any 3 colours of a worsted weight cotton yarn, I recommend cotton over acrylic yarn for this pattern as it will retain its shape better and is more sturdy.

Pattern is suitable for beginners. The design uses only single crochet and involves changing colors. The bag is assembled using a whipstitch.

I just used 3 colours for this pattern but it might be a fun way to use up scrap yarn and each puzzle piece could be a different colour!