My Pip loves to play peekaboo, and often chatters “where’s Pip” and then “peekaboo” while hopping around the cage or play yard. The other day he actually said it in context when we were playing. Usually I say both, but he’s getting the idea.
He also says the two phrases in different tones. Where’s Pip is in a lower tone and then peekaboo is much higher and more animated.