While we were in Kauai, we went to the beach or the pool just about everyday and for the first several days Naomi did not want to try snorkeling. This was after I bought her snorkel gear at Costco because she was so excited to try it. So one day I basically forced her to try it (before you render me a bad Mom let me just say she is actually a very good swimmer now and it's not like we sent her out there on her own or something) and just like I knew she would, she LOVED LOVED LOVED it and caught on very quickly.
She would use Henry as a platform so to speak to sit/lay on while she would adjust her goggles, empty the water out of them, wipe the fog off, etc. They would float out there for an hour at a time just about checking out all the fish on the reef. Needless to say, their backs got very tan.