One of the simplest ways to have fun with your family at the beach is body boarding or "Boogie Boarding". It's huge entertainment with some great cardio benefits and a whole-body work out. You don't need to have a lot of skill or even be a particularly good swimmer. The ease of entry makes it very fun for people of all ages. We carry a variety of sizes for rent by the day or the week.
A couple of excellent spots to try are A-Bay (About 1/3 of a mile down the street from our shop) and Hapuna Beach. There are boogie board spots all over the island to hit but this should get you started. Check out the video linked below for tutorial. There are no reservations needed for our boogie board rentals. Just come on in and get what you need.