Random bursts of Laughter

On Wednesday night we picked the kids up from my dad and Karen and Alexandra asked if I would play the "Happy" song. It's the song "Happy" by Ayiesha Woods. So while we're listening to the song, Sebastian just starts laughing and I mean belly laughs. When he does that he makes us laugh. I asked Alexandra if she knew what he was laughing at and she said "NO"! I think she was irritated that he was interrupting her Happy song. Anyway, Paul and I thought it was awesome that he was just randomly laughing during the song.