Are swim diapers required for children three years of age and younger? Yes, swim diapers are required for children three years of age and younger. Swim diapers are available for purchase at the Water Park in the Surf Shop. Was this article helpful? Related articles Are cotton shirts allowed on the slides? Are rash guards allowed? What swimwear is acceptable at the Water Park? Can we bring coolers into the Water Park? Do you require or allow use of water shoes in the Water Park area?