The children will be on a field trip, not sitting on couches playing Xbox in their pajamas with a foot of snow outside. But when Gov. John Kasich signs the “calamity days” bill in a Statehouse ceremony today to give most Ohio schoolchildren a break from having to make up too many missed days from bad weather, he will be surrounded by 29 fifth-graders from a Mansfield-area elementary who are, well, missing class.