Snorkeling is probably one of my favorite recreational activities to do! 
I have never snorkled before.  Can you tell me more about it?
Definitely! To start, you'll need a diving mask and a breathing tube, called a snorkel. You may even want a wetsuit.
When did snorkeling become popular?  Has it been around a long time?
I'm actually not sure, but snorkeling has been mentioned by Aristotle, so at the very least, it goes back to Aristotle's time.