Gus' Playground and Theresa's Splash Pad (Willmore Park)
✓ Last confirmed for the 2026 season
Where: 7200 Hampton Ave, St. Louis, Missouri
When: Memorial Day-Labor Day
Hours: typically daylight hours
Cost: free
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A space-themed destination playground in St. Louis Hills where saucer swings and a helicopter climber sit right beside the water play area. The pairing means kids can bounce between dry and wet play without leaving sight of one bench.