We are going to Grand Cayman in February. All 3 kids are in swimming lessons (although I don't expect Lucas to snorkle). I want Emma and Jeremy to learn how to snorkel. Am I being unrealistic that my then 3 and 5 1/2 yr olds will be able to master the snorkel technique. I already spoke to their swimming instructor about buying them equipment and having her practice in the pool with them, and we will do it at home this summer. Think it's a good idea?