Print out Button Fishes Quiet Book Page Template and cut 8 fishes in total, be sure to make two pieces of the same colour.
Glue or sew two fishes of same colour and cut button-hole in the middle, depending of your button size.
You can also make fishes in one layer but I would not recommend that if you work with standard 3 mm thick felt sheets. Under constant pressure and button off it may tear very quickly. That is why two layers make sense.
Cut sea grass and glue or sew it on your quiet book page. Sew buttons securely on your page and play can begin.