Technically, Craft = knitting/crochet (circles are knitted, accessories are crocheted)

This a Binary Search Tree, a data structure in computer science. I’m using it to store Doctors from Doctor Who, sorted by their regeneration number! (according to the second picture)

Each Doctor is represented by an appropriate color and an accessory:
1st Doctor: grey + walking cane
2nd Doctor: light blue + recorder
3rd Doctor: maroon + ruffly tie
4th Doctor: dark brown + scarf
5th Doctor: tan + celery
6th Doctor: yellow + rainbow umbrella
7th Doctor: red + hat
8th Doctor: dark green + pocket watch
9th Doctor: dark purple + leather jacket
10th Doctor: blue + 3D glasses
11th Doctor: brown + fez/bow tie