Needlecraft involves using needles and thread to create textiles and fabrics through techniques like knitting, embroidery, crochet, and needle lace. The document outlines four main types of needlework - knitting creates fabric through loops of yarn; needle lace uses small stitches to form lace; embroidery decorates fabric with thread; and crochet makes textiles by interlocking yarn loops with a hook. Safety precautions are also provided, such as keeping needles pointed away, using thimbles, and storing materials out of reach of children.