It is hard for me to believe, but many objects I used as a child are now obsolete. Obsolete means they are no longer in use! You can take a virtual field trip to the Museum of Obsolete Objects and see some of these items for yourself. Curators (the people who take care of the items in a museum) believe that the computer mouse will be obsolete by 2015!
Visit the museum by clicking here. After you visit the museum look through your home to see if you have any of these obsolete objects lying around. Comment and let us know what you find!