Crown pattern, do in double layer felt, fusible fleece between layers? add glue-on jewels, check Wal-Mart's craft aisle. Do elastic for band to ensure it'll fit multiple head sizes.
15 Minute Free Crown Pattern baby to adult size
Wish | Newborn Infant Baby Girls Clothing Set Crown Pattern Romper Bodysuit+Printed Pants Outfit
Ravelry: Free Toddler Princess Crown pattern by Leanne Growden