It's Mary's pencil
-s
's
kites
-s
's
It's the girl's ball
s
's
It's Mike's bike
s
's
Eight books
's
s
It's Sofia's doll
's
s
Four yo-yos
-s
's
It's the boy's dog
s
's
Six pencil cases
's
s
It's Tina's schoolbag
's
-s
Three trains
's
s
Two elephants
's
-s
It's Tim's skateboard
's
-s