FSLG is great with kids but my 2 cents is the kids club is very arts and crafts focused and my son wasn't into it and would much rather have music, games or some sort of water activity. 4 year old daughter no problem, but if you have 4 year old son (like me) expect to keep them entertained. It's not that hard in paradise -- it's amazing how long a 4 yo boy can be entertained with a shovel and super soaker water gun on the beach.

That said, everyone else on resort great with kids and <5 eats free which certainly is nothing to sneeze at.