Carbon forms a large number of compounds, more than any other element. Because of its willingness to bond to other nonmetallic elements it is often referred to as the building block of life.
The ukulele has four strings and are known by the notes G C E and A. Not only are these notes acoustic, but are now electric, and sound is made when the strings are plucked. The instrument is made of mahogany wood, but the cheapest are plastic, which are usually for children.