If enough of them have young kids (and your 40+ years - 10 puts many of your peers in the mid-30s), then they'll be going through the same stuff, only have less experience. Come in as the voice of wisdom and experience. It's useful!
Just don't spend too much time talking about old systems. Some older programmers do that, and it just distances themselves unnecessarily. Having used an older system isn't a technical merit, it's just saying that you're old. Interesting anecdotes, special features, and spectacular failures of old systems, however, are fun to hear.