IT'S MONO MONDAY

It is Mono Monday and the theme is...."check." Doing some "lateral thinking", as suggested, and using check as a verb, this situation might work.
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Little brother sez to big sister....."Hey! Check this out!"
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Found these two tykes at the zoo in Milwaukee...both fascinated by peafowl which have the run of the place. I'm pretty sure the boy was about to launch into a chase.
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Best seen in Large.