We have used lots of different Montessori sewing trays. Each tray or basket has focused on one activity or one skill such as needle threading or sewing buttons. This is our first real 'sewing tray', one which the child can use the materials and sew as they wish. Use running stitch on the linen in the embroidery hoop, sew buttons onto the felt, sew buttons onto the linen, sew felt pieces together, sew felt onto the linen. There is a limited range of materials available however the child has scope for creativity. I have tried many ways for managing thread....