If             you're         like           most           kids,  
you've         probably       broken         a              bone   
before.        Or             you            know           someone
else           who            has.           Have           you    
seen           a              cast           before?        Do     
you            know           how            casts          work?  
What           they're        made           of?            Whether
it's           OK             to             draw           on     
them?          Read           this           article        to     
find           out            all            about          casts. 
Think          of             a              cast           as     
a              big            bandage        that           has    
two            layers.        There          is             a      
soft           cotton         layer.         It             rests  
next           to             the            skin.          The    
hard           outer          layer          prevents       the    
broken         bone           from           moving.        Sometimes
you            can            choose         how            your   
cast           looks.         You            can            pick   
cool           colors         or             patterns.      Plaster
casts          are            usually        white.         They   
are            made           from           plaster        of     
Paris.         You            may            have           used   
this           for            school         art            projects.
Plaster        of             Paris          is             a      
heavy          white          powder.        When           it's   
mixed          with           water,         it             forms  
a              thick          paste          that           gets   
hard           fast.          Fiberglass     casts          are    
made           of             fiberglass.    It             is     
a              plastic        material.      It             can    
be             shaped.        Fiberglass     casts          come   
in             lots           of             colors.        If     
you're         lucky,         the            doctor         may    
let            you            pick           the            color.