I was inspired by ArtBar blog. But as I like to crochet, I decided to crochet a swatch for the hole instead of using piece of fabric.
So, first you need to trim the hole so that there are no frayed edges.
Crochet Monster‘s teeth
Ch(s) – chain(s)
SC – single crochet
Sl St(s) – slip stitch(s)
St (s)– stitch(es)
Chain a multiple of 3. (The length of your chain will depend on the length of the hole; in my sample – Ch 24).
Row 1. SC into second Ch from hook, SC into each Ch across, Ch 1 and turn.
Row 2. SC into each St across, turn.
Row 3. Sl St into 1st St of previous Row, *Sl St into next St; make tooth – Ch 4, Sl St into 2nd Ch from hook, HDC into next Ch, DC into next Ch – this complete first tooth; skip next St of previous Row, Sl St into next St*. Repeat from * to * to the end of this Row. Sl St into last St. Fasten off and weave in the ends.
Make two little eyes. Start with an adjustable ring. Ch 1, 8 SC into ring. Draw the loop closed. Join with Sl St in top of first SC. With black thread and sewing needle make a couple of stitches in the center of the eye for the eye pupil. Make second eye. Sew eyes on the pants.
Now introduce your child to his little Monster!