Jane Haller overhears this conversation between her 3-year-old twin boys one day: "I need to fix my car," Ray says. "I need to go to work. My beep is broken."

"Let me see the beep," Dan replies. "Oh, it's kind of beepy. Let me see the wheel. I'll check the other wheel."

As their pretend play continues, the boys talk about hammers and saws, concluding they'll use a saw for the job of fixing the "broken beep" because, well, they don't have a hammer.

For those few moments, as their mother watches from nearby, Ray and Dan are in their own world. Sure, their playtime isn't without its typical childhood mishaps – one wanting something the other has, one bopping the other over the head – but their parents are happy to see they often work together and truly enjoy each other's company.

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