This cute film was based on the simple observation that kids can make small problems really big ones, and often need a helping hand out. Here we see a little boy chasing a crab down a tiny hole, which he digs away at, until he is stuck inside. Therein lies the analogy for small holes becoming cavities if not looked after. 

 

There are some great bits of cinematography in this, which I am proud to have squeezed in.