Yep I sing all the time to'em.

Oz's song isn't too embarassing. I sing "Wizard of Oz" to him.

We're off to see the Wizard, The Wonderful Wizard of Oz.
You'll find he is a whiz of a Wiz! If ever a Wiz! there was.
If ever oh ever a Wiz! there was The Wizard of Oz is one
because... because because because because beeeeeecause...
because of the wonderful things he does.

He loves the long beeeeecause part.

Maddie's is pretty embarassing. I just sing her name to the
melody of "Moon River". There's nothing more special than her,
so lyrics just consisting of her name pretty much captures her.
Can't believe I'm gonna share this.

Maaadddd Rooie... Mad Mad Mad Mad Roo... It's Maddie Maddie
Roo... Mad Roo... It's Mad Rooie... Mad Mad Rooie...

and so on and so on. You get the idea. Both Oz and Maddie
love this one. I'll do the same thing with her name to the "Lone Ranger Theme Song" too.

Murph doesn't really pay any attention to my singing at all.
I sing "Somewhere Over the Rainbow" to him sometimes, but
I don't really get any reaction from him. He's evidently a lil'
more discerning than the other two.

Par...