There are many Sofia the First games for girls, including Royal Me, Minimus the Great, Royal Jewel Room, Royal Bubble Rescue, Magical Sled Ride and Sofia's Flying Carpet Adventure. A few websites that offer these games for girls are Disney Junior, Disney Princess Games and Games-Kids.
"Sofia the First" is an animated series on Disney Junior that features Sofia, a little girl who becomes a princess after her mother Miranda marries King Roland II of a kingdom called Enchancia. The Disney Junior site has a listing of Sofia the First games. Some other games are Keys to the Castle, It's Tea Time and Curse of Princess Ivy.
The Disney Princess Games and Games-Kids websites provide a great number of these girl games, such as Sofia's Enchanted Garden, Princess Sofia Mermaid and A Day at Royal Prep.