Turn your Little Critters into Little Knitters!
As a relative, or even a teacher or childminder, allow the children you know to have the joy of knitting, and keep it passed down the generations. It's great for bonding, or a social activity, as well as being a great evening activity - one that will make them less 'wired' before bed and ready for a good night's sleep (and get them off the tele or iPad!)
However - teach it to be fun from the start! They too, will probably get fed up quickly of knitting nothing but a scarf. So pick something particularly suited to them.
Use a simple pattern, like the ones on this site - I've chosen them for this reason. There are also great knitting kits available for children (with everything they'll need, without giving them your best bamboo needles).