Simplify the following text for a Grade 4 native English-speaking person.
Original: A text box , text field or text entry box is a common element of graphical user interface ( GUI ) of computer programs , as well as the corresponding type of widget used when programming GUIs . A text box 's purpose is to allow the user to input text information to be used by the program .
Simplified: A text box is a box that people type things into on the computer .