To see others develop an interest in fibres, and knitting, in crocheting, in creating things. Especially when those others are your children.
These past few weeks boy #1, aka 'oldest', has been watching me crochet my Scheepjes CAL mystery blanket. Every time I start a new square he's commented, has made colour suggestions, has asked me to tell him about it, has asked me to teach him, has asked me to let him have a go.
And I have taught him, and I have let him have a go. Admittedly, often I unravelled what he'd done as soon as he was out of the room, but most of the time it's not (anymore) because it's totally wrong but because it always shows in the stitch consistency if someone else picks up and continues your work. Plus, he still pulls quite a bit, which makes for massive loops. ;)
He is getting the hang of it, though, and a few days ago he even came up with his own pattern. I had taught him crochet chains and doubles and trebles, and he was up in his room in the evening, experimenting with that before bedtime. In the morning he came down and presented me with a necklace.
Apparently he'd been meaning to make a wrist band but ended up crocheting into the same stitch over and over. Maybe a slightly unorthodox way of creating a pattern, but a pattern it is, because he then set out to teach me how do make what he calls a 'Donut Necklace'. They really are quite pretty, aren't they? :)