there is plenty to do to keep kids entertained. family kingdom amusement park has rides for all ages. plenty of mini golf places. carolina opry is a great show. maybe catch a pelicans game. my DD14 and friends were bored at wonderworks but I think it would have been a hit when they were your kids ages. check the websites of the attractions you are interested in. some places have coupons or package tickets with other attractions, ex. myrtle waves waterpark has a 3 park ticket good for 1 visit to myrtle waves, 1 visit to nascar speedpark and a ticket bundle for the rides at broadway at the beach. i haven't been to the nascar park in a long while but they did have a track just for little kids. im pretty sure its still there. also, pick up the free coupon books you will see all over myrtle beach. they are full of coupons for a few bucks off mini golf, etc.