Paper route
Indoor chores for neighbors and friends' parents
Outdoor chores for neighbors and friends' parents
Grass cutting
Snow shoveling
Weed pulling
Car washing
Leaf raking
Dog walking
Cat brushing
Animal cage cleaning
Lawn furniture washing
Porches, walls, doors washing and painting
Babysitting
Caring for small children (mother's helper)
Tutoring

I think that a 13 year old can be a singer or actor

I think that a 13 year old can be a singer or actor
For money? Name one who has done this. Then name the other millions who haven't.

I think that a 13 year old can be a singer or actor

LMAO! This isn't reasonable. First, the 13 year old would have to have talent. Second, the 13 year old would have to get really lucky.

This OP is asking for legitimate jobs, not for dreams.