Preschool 4 teaches preschoolers deep-water entries and treading water while wearing a PFD. They will become skilled at retrieving objects from the bottom of the pool (in chest-deep water) and performing front and side glide. Front crawl wearing a PFD is introduced. Games are used to teach concepts and skills. Preschool 5 or Narwhal (the unicorn of the sea) teaches Swim to Survive® skills while wearing a PFD. Front crawl and back crawl are introduced, as well as interval fitness training. Preschoolers will learn how to tread water and perform vertical whip kicks with a buoyant aid. Once complete, swimmers register into Swimmer 2.