Any ideas for a FInding Nemo lesson plan?

I have a Finding Nemo book that I have condensed so that I won't lose the children's attention. I also thought of making play dough fish, coloring fish and putting them in a fish tank (painted fish tank on paper) and a search to find Nemo with a few clues leading the children to Find Nemo. Does anyone have any ideas that could be used in a Finding Nemo lesson? The children are 3-5 years (there is also a 1 yr old but i can do other things with her)