one is the loneliest number

Kenny can now count to ten, and he loves to practice. He has an odd aversion to the numbers one and eight, however, and they are often overlooked. Six and seven are usually whispered, but they are at least acknowledged. Two and nine are done with enthusiasm, and ten is almost shouted with glee. As for three, four, five, well he rolls through those just fine.

It's really fun to watch and I'll try to get a video of it soon. In the meantime, you'll just have to take my word for it.