A box filled with "how to do" pamphlets and books. What strikes your fancy?
What is it you always wanted to learn?
Whatever it is, it's probably in this box -- needlework, knitting, crocheting, lace making, doll making, sewing, stenciling, upholstery, basket weaving, and heaven knows what else...
Look for it next to the quilting box, under the card table.
