In this tutorial, we learn how to make a simple shell necklace with your kids. To make this, you will need: a sea shell, a hot glue gun, and a necklace string. First, tie your string into a knot at the end of it. Next, grab your shell and apply glue with the hot glue gun to the inside base of it. Now, press the knot that you just made onto the glue in the shell. Let this set up until the glue is completely dried, and you're finished! You can apply more glue to the top if you want a more secure hold.