Eldest child and I share an interest in auctions and collectibles, and often go rummaging together.
Middle child and I do crossfit classes, and once or twice a year we go wild camping and hiking.
I adore my youngest, and so far nothing has naturally come up that we both share an interest in. Would love to hear what activities other people do with their children - maybe I'll get an idea for something youngest and I can have a go at.