We have this silly little thing we like to do in this house.
It all started with me. If something exciting was happening I would express it in my face. Soon I started noticing Liza was making the same face after telling me something exciting. And then Jason picked up on it as well.
It's now known as the excited face and the kids will typically do it on command.
And it makes for interesting pictures.
You would think they were on an exciting ride or something. But nope... they were just on the slide that was all of a sudden fixed and I said "Make your excited faces!"