OK…. I am going to make this a little harder… here are several child celebrities! Some are going back quite far!
The sweetheart next door…
The neighborhood terror!
In a movie she got a “book on her backside”
She was always playing someone’s sweetheart, and appearing as the younger sister of the most popular motion picture character.
The Haasienda on Shroyer... 
1) Joni/Erin from Happy Days and/or Joni Loves Chacci2) Either Beaver from Leave It To Beaver or the kid who played Dennis The Menace3) Kinky, Darin! But I think it might be the one von Trapp daughter in Sound of Music4) I know! I know! Ann Rutherford who played Andy Hardy’s girlfriend and Scarlett O’Hara’s younger sister. When I am waiting on you to finish lessons or you guys are getting ready I will read through some of your books. Yea! I am so smart!