Travel with Children - Question about Airport Lounge (Newark & London)

I'm traveling with wife and 1.75 y/o baby. We have 5 hour wait while connecting in Newark, then continuing to London with a 6+ hour wait there before connecting with Aeroflot. I don't think I have an option but to get a lounge. But I know nothing about it - can anyone advise? Is there a pass that would good for both airports?

Hello, and welcome to Flyertalk!

Can you let us know which airline you'll be using? That may help me to direct your question to the most pertinent forum.

BAMAT
Co-Moderator, Travel with Children