A great preschool craft (or really for any-aged kids crafts) is an ocean bottle.  This is really easy to do, and you can mix it up any way you like to meet the needs of the children you’re with.

I just started with an empty juice container and some supplies I had around the house:

Then I pulled out some tinfoil to make “fish,” and The Younger and I went around the yard to find acorns and small rocks for “dolphins” and “coral”.  After that we filled the bottle with water, added some blue food coloring, and she went to town creating her own piece of the ocean.

She spent about 30 minutes after adding all of her treasures shaking the bottle around an laughing.  It’s been a source of enjoyment for a few days now, and we’ve done a lot of reading about different ocean animals and the ocean environment too.

*hint* Glue the bottle top closed.  I’m sure I don’t have to explain why.