I work with the neighbor girls, and it is so much fun! We did tissues covers for their teachers at Christmas. We used the same technique and filled with them potpourri (in a loose fabric bag) for sachets for Mother's Day. The sachets had a ribbon tied around the middle and a silk rose tucked in. The girls I work with love to embellish, so ribbons and tulle are part of our stash. We have also made pillows.
Our rule of thumb is no motor sewing until their 8th birthday. That is older than necessary, but these are someone else's children, and I don't usually get them one at a time. So unmotorized sewing requires another child or me to be turning the wheel. We have a system of "stop" and "go" that is respected by all involved. Even the one turning the wheel seems to have fun -- it guess it beats standing there waiting for your turn.