Hmm, I can't say I'm particualrly fond of any child actors (would be in my overall section then), but I can add the ones I cared for most.
Well, after going through the list, I really found some wonderful performances Thanks fro the reminder Sara 

Here's the best:
Eamonn Owens - The Butcher Boy (1997)

and the rest:
T.J. Lowther - A Perfect World (1993)
Christina Ricci - Mermaids (1990)
Jackie Coogan - The Kid (1921)
Madeleine Desdevises - La drlesse (1979)
Edward Furlong - Terminator 2: Judgment Day (1991)
Jiseon Kim - In Between Days (2006)
Victoire Thivisol - Chocolat (2000)
Jodie Foster - Taxi Driver (1976)
Anna Paquin - The Piano (1993)
Jean-Pierre Laud - Les quatre cents coups (1959)
Subir Bannerjee - Pather Panchali (1955)
Keisha Castle-Hughes - Whale Rider (2002)
Tatum O'Neal - Paper Moon (1973)
Saki Terashima - Mizu no hana (2005)
Jonathan Brandis - The NeverEnding Story II: The Next Chapter, It (both 1990)
Christian Bale - Empire of the Sun (1987)
Inger Nilsson - Pippi Lngstrump (1969)
Ana Torrent - Cra cuervos (1976)
Delphine Zentout - 36 fillette (198 
Elryan de Vera - Ebolusyon ng isang pamilyang pilipino (2004)
Jesse Bradford - King of the Hill (1993)
Yya Yagira - Dare mo shiranai (2004)
Hanae Kan - Dare mo shiranai (2004)
Masahiko Shimazu - Ohay, Ukigusa (both 1959)
Macaulay Culkin - Home Alone (1990), Home Alone 2: Lost in New York (1992), The Good Son (1993)
Jeremy Cooper - The Reflecting Skin (1990)
Brett Kelly - Bad Santa (2003)