What have you taught your grandchildren?

GC aged 8 & 3 were with me this morning for a baking session. Their mum, who works and doesn't have much time, or enthusiasm! for baking, commented that she was very glad that GC had learnt to bake and she wished she'd learnt when she was a child. It got me thinking of the skills, large and small, that we pass on to our GC; I was taught mainly by my maternal GM. I've taught GD bake, knit, some gardening skills, cross stitch (still a work in progress but we're getting there) and all the words to There Was an old Woman Who Swallowed a Fly!
What little nuggets of skills have you passed on?