The kids will sleep soundly after frolicking by the seaside at Kapaa Beach Park. Look for cute critters like crabs and snails, stick a toe in the water or toss a beach ball around!
When you've finished up at this Kapaa stretch of coastline, why not check out Lydgate Beach, Coconut Marketplace, and Wailua Falls? They're close to Kapa'a Beach Park and also popular with many travelers.