Cowabunga's, the inflatable bounce center located next door to the Hooksett Shaws Supermarket opened quietly last November, but even owners Kelly and Matt Pearson weren't expecting their early success. The 14,000 square foot space, the largest of it's kind in New Hampshire, was formerly an Osco Drug store. The space was gutted, coated with vibrant paint, and filled with premium inflatable slides, obstacle courses, sports games and more. Since then, Cowabunga's has hosted more than 300 private birthday parties and hosted 2,000 kids and their parents during April school vacation week for walk-in play. All, Kelly jokes, without a sign above their storefront.