Hello- we used to live in Charleston.
Beach- go to Sullivans- the water is very calm/no waves and there are family friendly places for lunch etc. Not as crowded as IOP.
Food:
Poogans Smokehouse- its good BBQ and they also have healthy sides in nice atmosphere thats OK for kids
Lunch- Taco Boy- good outdoor area kids can run and be loud, good margs
Breakfast- Vintage Cafe in Mt. Pleasant- they have a playground in the outdoor seating area and the food is very good.
Marion Square Market- Saturday AM only. great breakfast and little shops. they also have live music kids dance to and typically also a bounce house.
please feel free to email me about any of the restaurants you consider going to-- we have been to most....
whitney.r.irish@gmail.com