This project is super simple. Following the pattern, let each round represent two rows on your work. Add tassels for added flair (optional).

Baby Size - Complete Pattern
Large - Repeat Pattern Once
Extra Large - Repeat Pattern Twice

Colour Recommendation:

Red
Orange
Yellow
Green
Blue
Indigo
Violet

White or Black (pattern shows white for example).

Example made with RHSS, any yarn should work fine.