New way to Pluralize?

Ben's talking has taken huge strides, but one little quirk is still sticking around and somehow it's really cute.  Instead of just putting an S on the end of words to make them plural, he adds "uhs."  Instead of sharks, it's "sharkuhs", instead of times it's "time-uhs", instead of arms it's "armuhs."  It's really weird and random and super cute and I know it's going to go away shortly and I will miss it.  We've spent our entire parenting lives never talking baby talk to either kid, but we're kind of doing it with "sharkuhs" and the rest because, well, we're so close to not having any more baby in our life.  There's just a little bit left in Ben, so we're going to hold on tight.