Reusable swim diaper

Neoprene wetsuit also available at:

warmbelly.com

Kid's swim cap

Kid's goggles

Toddler fins

Kid's fins

Pool float

(large enough for child to sit on!)

Large floating mat 

more available: 

here & here

pool floor spot markers

No-mold water toys

Dive rings

Infant float

(NO leg holes!)

Waterproof baby sling