Lucky for us, my Dad had a layover on Saturday night here at the SLC airport. I let the two oldest stay up a few hours past their bedtimes in order to indulge them in a full hour with their Grandpa "Atch", as L. would say. Undoubtedly, they were the most hyper and over-tired human beings at the airport but they were also having the most fun too. More than a few bystanders found amusement in their antics :)
And by the way Dad, the kids could not love their little cups any more.