Each and every one of them.
I mean i get it. They are so curious with the world and they want to share it with you. Everywhere you go, it's "Look!" or "Look at this!" or "Look at that." They see something amazingly awesome that time itself must stop and everyone should hold their breath and glance if just for a moment.
But the truth is, that us adults have seen it. We've seen it a thousand times. Whether it be that crow that just landed on the grass, or a purple car, or somebody with a big cowboy hat. There's always something new for them to see. And naturally they want to share it.
But it doesn't stop there. Too often, its some variation of the classic 'look at me, i'm amazing.' Puffed out cheeks. Tongue doing something strange. Stuffed animal in a funny position. And it happens ALL THE TIME.
Especially in the car. And that's when i've got to draw the line. I get relatively easily car sick. But if i looked back each and every time they did something or saw something, i'd be at the chiropractor daily suffering from whip-lash. I love my minions dearly, but honestly, after about 16 "look!"s in a row, i am ready to throw them out the window. So what to do?
Without stifling their curiosity, when it comes to driving, i tell them (calmly!)each time they shout out "look!" that i can't look because i'm driving. And that the #1 job of the driver is to look forward for safety, but that i would be happy to look at the next stoplight.
Effect? The "look!"s have subsided dramatically. But i can't still help to feel that i've squashed their thirst for validation at least a tiny little bit.
I guess you can't win 'em all.