I was in the kitchen baking cookies yesterday afternoon. Lillie and Elliott got up a little early from their nap, so I threw a few Cheerios in the pack and play with some toys and let them play in there for a little while. I could hear them laughing at each other. I tried to get it on video. Of course they calmed down a little when I got the camera out.
(the quality is poor. i tried to zoom in where they would not know i was filming them)