It is offered in our store. Click this product link to order.
Each set comes with 3 rolls of printing paper, one of which has an adhesive back so the kid can cut and stick it to any flat surface. The other two rolls are regular thermal paper.
The standard roll size is 25mm diameter and 57mm width. It is rated as 10-year grade thermal paper.
It is also compatible with similar instant print cameras or thermal printers.
Thermal black and white printing requires no ink and the consumable cost is only ~5% of a traditional instant print camera.