Bart Simpson and Lisa Simpson both live in Springfield with their family. Bart is 10 years old and his best friend is Milhouse, while he also has a dog named Santa's Little Helper. He attends Springfield Primary School but only likes the breaks to be with friends. His hobby is skateboarding. Lisa is also 10 years old and lives with her parents and siblings. She has a pet cat named Snowball. Lisa loves attending Springfield Primary School, especially for studying math, and her hobby is playing the saxophone.