Baby will be interested in the sounds and the different sensations when they touch the scrunchy stocking.
When it makes an interesting sound, they’ll be encouraged to repeat the action.
Baby is learning that they can make something (a noise) happen, and when they repeat the action, they get a similar result (cause-and-effect learning).
How to do it
You need a leg section of pantyhose and 3 or 4 items that make noise and/or have different textures, to stuff into the piece of pantyhose. For example:
a noisy/crunchy biscuit wrapper
a ball of wool
some milk bottle lids
cotton reels.
Push one item into the toe, knot the pantyhose, add another item, knot the pantyhose, and so on. Continue until you run out of pantyhose.
Place the scrunchy toy where baby can reach it when they are on their tummy on the floor.
Give baby the words that go with the sounds they make — ‘noisy’ ‘scrunch’ ‘crackle’, ‘quiet’, ‘rattle’, and so on.