A couple of years ago I had a student who pronounced the letter f with a "b" sound. One morning she came in singing a new song: "Bish eds, bish eds, oly oly bish eds. Bish eds, bish eds, eat dem up yum!" I had no idea what she was singing, but another parent recognized it as "Fish Heads" by Barnes and Barnes, so we all watched it, and it became a sort of class song.
I was tickled to find an idea for a fish hat recently, at www.abbythelibrarian.com, and had to use it for our letter f review day. The original author even included a reference to "Fish Heads", so how could I resist?
Here is my modified version. I used 12" x 18" construction paper to make our fish, as I had some on hand. I drew out a fish shape, making sure the body of the fish was about 12 inches long - I wanted to be sure that two fish bodies would fit all the way around the children's heads. From all the scraps my assistant and I cut lots of circles to represent scales.
Each child decorated two fish, one facing left, the other facing right. They glued the scales on in an overlapping pattern. We needed many more scales than I had anticipated - if you decide to do this project, expect each child to need about 40 - 50 large scales.