Bay side beaches are safer for kids. We like to be further out on the cape to be near activities we like and family that live out there. Activities to consider with little kids- whale watch, seal watch, kayak or paddle boat on the Swan River in Denis. National Seashore and the Boardwalk in Sandwich to the outer beach(if it is still there! Every time we have a storms some of it gets ruined). There is a bike path along the Cape Cod Canal and an extensive on throughout the cape. There is also a nice relaxing cruise up the Cape Cod Canal.