Subject
Twins
Siblings
20
Bobbsey Twins (Fictitious characters)
10
Hispanic American families
5
Exploration
4
Families
4
Magic
4
Sisters
4
Conduct of life
3
Imagination in children
3
Schools
3
Brigands and robbers
2
Brothers
2
Fortification
2
Missing children
2
School field trips
2
Valentine's Day
2
Valentines
2
Ability
1
Adventure stories
1
Agricultural exhibitions
1
Amusement parks
1
Apologizing
1
Autistic youth
1
Boat living
1
Bullies
1
Bullying
1
Camping
1
Celebrities
1
Children's stories, Serbian
1
Cloning
1
Conjoined twins
1
Country life
1
Cousins
1
Dance
1
Dating (Social customs)
1
Deciduous teeth
1
Description and travel
1
Detective and mystery stories
1
Earrings
1
Earthquakes
1
Elementary schools
1
Emus
1
Extraterrestrial beings
1
Family relationships
1
Family secrets
1
Friendship
1
Games
1
Gifts
1
Haunted places
1
more ...