Dad gives baby a beard and mustache after mom leaves

When his wife let him home alone with their baby, Bartosz took advantage of the perfect opportunity to have a little fun with his adorable new child.

Bartosz devised a hilarious plan to get some laughs -- and it seems like he got what he wanted, because he just can't keep it together.

The new dad is seen sticking fake bushy eyebrows, a mustache and a goatee to his baby's face. Who knew facial hair could be so adorable?

This is hardly a new fad -- lots of parents have given their kids facial hair to draw a few laughs. But as Bartosz laughs hysterically, his baby gets a fit of giggles, too, resulting in a very special father-son moment.

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