I'm A Big Kid Now - What 11 year olds say when they're trying to be responsible

What 11 year olds say when they're trying to be responsible but still mess everything up.

I'm a big kid now, so I don't forget my homework.

I'm a big kid now, so I don't spill my juice all over my desk.

I'm a big kid now, so I don't talk to my baby sister.