I love playing games with Libby - she is so attentive to new or interesting stimulus (at least in small doses so she isn’t overwhelmed). This is a picture of us playing the “right ear, left ear” game, where I cover one ear at a time and make some funny noise.

I imagine that it’s surprising for her to hear out of only one ear at a time - hence the giggling. Make sure to watch the video to get the full giggle effect.