It might be unprofessional, but I'd laugh and roll with it even as someone without kids. Especially for internal calls within your team, probably not a bad thing to do - you want to have a fairly relaxed relationship with them generally, so this kind of stuff is expected and perfectly fine as long as it doesn't get in the way of work too much.

With clients, I can definitely see it being a bigger problem.

Maybe this is just evidence that a lot of people I work with just aren't developers because they love development that much - they like it enough and it pays enough to get the things they want in the rest of their time and there's nothing wrong with that.