Thankfully, we found the answer this week: she's really saying "Five, six"! The Wiggles have a few songs where they count, and one of Leah's new favorites is about a chicken with SIX little chicks and they count them twice in the song. Ah-ha! Now that we've figured this out, we can clearly hear Leah saying, "One, two, five, six!" (She doesn't seem to care for three or four, oddly enough.) ;) We are quite relieved about this one.