In the summer, when you go to the beach, look across all the sand. That sand is made up of silicon. Imagine how much sand is on all of the beaches of the world. Almost all of it is silicon. All that glass you see is made from silicon.
Scientists take sand and melt it down.
When it has melted. Inside your body is your skeleton. You might not know that there is an element called calcium which is the main ingredient of your skeleton. Silicon is also inside your skeleton. Silicon keeps your skeleton strong and healthy.