Thunderbird
I spent the first 30 years or so of my life avoiding children like the plauge. Judge how you want – one of the consequences of that is that I don’t know the lyrics to many children’s songs. Since my daughter has never been a good sleeper (spare me the advice – been there, done that) we ended up buying a musical toy for her crib. It has four or five different songs on it that play in rotation.
I have an idea how many of them start. One of them is “Hush little baby don’t say a word – mommy’s going to buy you a mockingbird…”.
That is the sum total of my knowledge of the original song. However, the fact remains that my daughter likes when I sing to her (I have no idea why) and goes to sleep faster. So I just made up lyrics:
Hush little baby, don’t say a word
Daddy’s going to buy you a Thunderbird
If that Thunderbird isn’t great
We’ll drop in a 308
If that 308 isn’t fast
Daddy’s going to buy some premium gas.
If that gas doesn’t make it go far
Daddy’s going to buy you a brand new car
(and repeat!)
Hanna refers to this (currently, at age 2) as “Funderbird”. She sings it by herself now. I am the only person to blame if she grows up and falls in love with a gear head who has a Thunderbird.

That’s awesome…I had no idea you had such engine knowledge.
I was curious, so apparently a 308 is unique to the Holden (http://holdenpaedia.oldholden.com/Holden_Model_Listings, Google) model line, although you could bore out a 302 Ford V8 to 308, I suppose. I have no idea if that’s realistic. Ford did have a 3.8L V6, apparently, in a Thunderbird from 89-92 (thank you again Google).
She won’t end up with a gear head if she doesn’t get the engine displacement for the model of car right. Or maybe you could use “big V8″ instead of 308 and avoid all the controversy.