Option Use I second piece of same bottle, make a pincushion on one end ( glue gun a ribbon to cover the raw edge) and the zipper for a sewing kit! Two plastic bottles and a zipper, nice small gift holder.
Igloos are cool. What kid hasn't wanted to build an igloo? You can easily build an milk jug igloo in your classroom with some planning, lots of milk jugs and hot glue. This could be a fun winter craft for the kids when it's too cold to go out.