Simple Online Photographic Dictionary
a visual dictionary that can be used as a children's picture dictionary,an English language learning tool or a cross-cultural reference.

A xylophone is a kind of musical instrument. You make music by hitting the different-sized keys with a small hammer to make a tune.
Xylophones are only made out of wood. A metal xylophone is called a glockenspiel, most people call them xylophones no matter what they are made out of.