What's a Pomball? A pompom that you knit to match your hat. How do you attach it? I'll walk you through.
See the Pomball Collection here: https://www.ravelry.com/patterns/sources/pomball-hat-collection
TIMESTAMPS
0:48 beginning with the ends
1:06 easy needle threading tip
1:20 knotting
2:00 snap for removable option
2:30 sewing spiral
3:40 check the outside
5:00 knot and weave in
5:50 bury ends in pomball