They're good to eat. Make gumbo of 'em.

Boy you sure are a lot of help! How long do I cook them? Ha!

45 crawfish receipes on this Web page alone.
Good luck. (I don't know how to get rid of 'em.) http://www.recipesource.com/main-dishes/seafood/crawfish/

Is you land near water? if not, their not crawdads but maybe moles.

I always thought crawdads lived in water. Arent they freshwater shrimp?

Crawdads, more commonly known as crayfish, are not freshwater shrimp but I think they're related. They don't have to live in a body of water. I've found crayfish living under a board or rock. They do like wet areas and usually reside in water but often dig holes in the ground. You can recognize the hole by the mound of mud around it.

oh right tiny lobster looking things, I remember seeing them at a park pond once.