Free/cheap stuff in/around Ocean City, MD?

Free/cheap stuff in/around Ocean City, MD?

We're going to Ocean City, MD next week. So far, the only cost we have is gas getting to and from. A friend is letting us use his condo for free, and we're bringing food and not eating out anywhere. Besides the beach (and I'm assuming there's a pool @ the condo), does anyone know of free/really (really) cheap stuff in the area to do/see? We = myself and my husband (in our 20's), our six month old son, my mother, and my 13 year old sister...so we're looking for things good for a wide age-range. :) I haven't been to Ocean City in over five years, I've heard it's been built up a lot. Any suggestions are appreciated. :)
Yams – the breakfast of champions

Yams – the breakfast of champions

My front lawn

My front lawn

violas

violas

Eggplant Harvest

Eggplant Harvest

Several unkowns

Several unkowns

* tulips *

* tulips *