The state of being on the same wave length as members of a younger generation. To be cool, clued-up and enlightened as a result of ones knowledge and/or pursuit of the interests, passtimes and trends commonly associated with people younger than oneself. A characteristic commonly displayed by minor television personalities, celebrities and people involved in entertainment media, trend spotting, marketing and advertising.
I better get myself snowboarding if I want to be down with kids.
I almost broke my neck the other day learning how to skateboard but hey I'm down with the kids!
British TV personality Alex Kramer is down with the kids! High five!