To make the spider I chained 4 then slip stitched to form a ring then did 6 single crochet in the ring then slip stitch to join.
Leg: chain 4, slip stitch in 2nd chain from hook and next 2 stitches to make the first leg. Slip stitch in the same single crochet that leg came from and repeat to make a second leg. Slip stitch in the next single crochet and do two more legs. Repeat until you have 8 legs and fasten off. Pull spider legs into place and sew on to headband.