Game music = good lullaby?

[charlesr]

Cool outrun tune.

Best thing I've found is the deep rumble of my car's exhuast note. Sends them to sleep in seconds

[Guts]

I really like the Deadly Premonition title screen song. Very relaxing.

[Wools]

I'll have to go with one of the choice cuts from Ridge Type 4. A beautiful, calming track and hopefully your little son will drift off to sleep with it.