It's not like I'm suggesting going down to the Biz lounge and having a child go mad there.
LGW had a kids section in the BA business lounge, a separate room where they could be kids and enjoy themselves.
I worked with the lady who project managed the lounge and always thought she was very smart to incorporate it, as BA had a reasonable amount of premium leisure traffic.
Why shouldn't kids enjoy themselves? Mine are teenagers now, but I still enjoy watching children being children