"Finding Nemo" came out 8 years ago and younger kids may not have seen it unless they have older siblings, it is a very movie and a unique movie of a father/son relationship and adventure to find one another after Nemo is caught after he and his friends veer away from school and his friends dare him to touch a boat.
These free* downloadable paper crafts that are marked "easy" at Paper Inside to make would be a fun project to make before or watching the video and could even be incorporated into a teaching tool.
You can download Nemo and/or his Dad, but I would have to say Bruce the Shark is my favorite.
*Free, although you can donate via Paypal to help keep the site going
Disclaimer: I have no affiliation with Paper Inside and received nothing for posting this - I just think they are cool.