3 person family poses? Help!

We are going to be taking some family pictures tonight. My wife and I are pretty new at this. I want to have some ideas up my sleeve for better poses than the typical triangle: mom/dad, then son in front. Here's the setup:

We will be outdoors
Mom, thin and short
Dad, large body
Son, 11 year old, thin

Let me know if you have some good posing ideas! (picture examples would be great) I could really use the help! I'll post the pictures I take afterwards so you can see the results.

Thanks!

Maybe something like this? Kid in focus parents in background.
http://www.flickr.com …/in/set-72157628008885025

Will you have any access to structures, like bridges, benches, stairs?

http://dustinizatt.com …on-mini-sessions-round-2/
The first family set on this page, the second, third, fifth and sixth are nice and not super triangular. I especially like the laying on the ground one.

Something like this?

Wow KareBear, that was fast- and very helpful. You are awesome!
We'll be sure to use some of these tonight!

Thanks!!!