Who knew penguins could giggle?

The iVillage team made a fascinating discovery this week: penguins giggle when tickled. Really.

Watch this video of Cookie (cutest name ever, no?), a little penguin at the Cincinnati Zoo, cackling away as he's tickled under the wing. His joyful outbursts sound like a puppy, a cat and a squealing 4-year-old all rolled into one. Adorable.

The tickling commences around the one minute mark.

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