Had this project on my mind.
Done!

This designer’s directions are very clear.

Designer innovation:
She has a very clever technique for achieving the shaping of the hat.
I learned a new stitch there!

Another designer technique:
The increases/decreases for the sphere shape are staggered thus creating a better round shape than the usual stepwise increases one round to the next.

If you have a sparkly yarn, it sure adds to the fun!

I didn’t sew the hat on. Fun for play. It stays on quite well as is.