In rainy-season Pattaya it is safer to split the day into beach in the morning and indoors in the afternoon. Monsters Aquarium, Underwater World and Frost open at 09:00 and PADO Media Art Space and the Dolphinarium at 10:00, so they serve early hours as well as a wet afternoon.
With parents, seated venues are easier. The Dolphinarium shows in an indoor theatre and Underwater World lets you walk its themed zones slowly. Lighting Art Museum does not admit wheelchairs or strollers, so choose another place if anyone has trouble getting around.
Height bands differ by venue. Children are 91 to 139 cm at Monsters Aquarium, 91 to 130 cm at Frost, 95 to 135 cm at PADO and 80 to 120 cm at the Dolphinarium. The same child can be an adult at one and a child at another, so measure before booking.
If you give one dry day to animals, Sriracha has Tiger Topia and Family Park Sheep Farm. The farm fixes its parade, dog show and bird show times, which makes arrival easy to plan, while Tiger Topia closes at 16:00, so go in the morning.
Check the dress rules as well. Frost requires boots and socks and PADO refuses heels and dress shoes. Monsters Aquarium and Tiger Topia run in rain, and refunds are difficult if you choose not to attend.