Sentence 1: The kids loved playing on the playground. 
 Sentence 3: They would go back and forth on them 
 Sentence 4:  They did it so much, their hands started hurting 
 Sentence 5:  They were relieved when recess was over so their hands got a break 
 Option 1: The monkey bars were their favorite. 
 Option 2: The slide was their favorite.