Laughter.

My children are upstairs in Ryan's room and both are laughing to beat the band. Every few seconds Ryan says Lilly's name and then he bursts into laughter again. If I didn't know better I'd think she is tickling him because the laughter is that intense. What can be so funny?

I may never know because I don't want to break the spell by going upstairs to check on them. I am just going to enjoy it while I can because it may turn to tears and screaming at a moment's notice.