When I was in Kindergarten several years ago now I remember a boy in my Kindergarten Class who peed on the floor and pooped on the floor because he thought it was funny.
When his mom showed up she had a diaper and put him in a diaper.
She said that since he could not go to the toilet and peed and pooped on the floor that he would be wearing diapers to school and at home as well.
She took him to the bathroom, put the diaper on him and made him wear it the rest of the day in school.
Everyday he came to school wearing a diaper and those were crinkly Luvs diapers back them with barney the dinosaur on them.
He hated wearing the diapers but he had to wear them all the time and even the next year when he was in first and even 2nd grade at age 7 and 8 he had to wear diapers then as well.