Maybe I'm soft now that I have a baby, but if this doesn't make you laugh, you need to check and make sure you have a soul. Google Video Link
I have a baby now and like that sort of thing better than I used to. And it did make me laugh. But, I also have to agree there's something sinister about 4 identical bald babies laughing in unison.
That reminded me when I worked at Toys R Us and we would play all the same singing dolls in unison on the shelf. Having 15 Elmo's singing the exact same thing at the exact same time would always freak out some customers. Man, I miss that job.