H2OGo! Underwater Adventure Sprinkler Pad – Costco Sale! by Rhonda June 28, 2022 *UPDATE* 6/28/22. The H2OGO! Underwater Adventure Sprinkler Pad from Costco is a colorful ocean-themed pad with an inflatable rim that surrounds the pad and traps the water, creating a shallow… 0 FacebookTwitterPinterestEmail