Spread Jam or Mayonnaise (or any other spread like Nutella, Peanut butter, Vegetable ..) evenly on chapatis. Roll it, cover with a butter paper (grease proof paper) and seal the edges carefully. Chapati roll is ready now.
The rolls can also be made with other non traditional filling like egg burji, paneer burji, boiled egg burji, potato masala used for samosa, shredded tandoori chicken mixed with onion and mint..
As I mentioned above there is no limit for creativity while preparing rolls. I'm sure the kids, who're the targets for these rolls will certainly love them.