Here is a little trick to catch all the attention at the beach. And in the process, catch some clam too. If you want to gross people out and make them look at you in a woah-that-guy's-weird manner, here is your modus operandi.
First off we'd need some salt, and a beach too.
Then you have to add some water.
And you can see something springing up.
That's a clam
Source