Your kids will thank you for taking them to the brand-new Cape Codder Water Park at the Cape Codder Resort & Spa in Hyannis opening this summer. The 30,000-square-foot indoor water park features four body slides (ranging from 50 to 160 feet in length), a 300-foot “Stormy River,” kiddie spray pool and play area, wave pool and snack bar. To top it all off, a retractable roof opens in good weather and closes for continuous play on rainy days. 1225 Iyannough Road, Hyannis, MA, 855-861-4370