Simplify the following text for a Grade 5 native English-speaking person.
Original: Barbie 's careers are designed to show that women can take on a variety of roles in life , and the doll has been sold with a wide range of titles including Miss Astronaut Barbie ( 1965 ) , Doctor Barbie ( 1988 ) and Nascar Barbie ( 1998 ) .
Simplified: Barbie 's current sister is Kelly . There have been many other dolls like Barbie since Barbie was first produced .