Say Hi

Last night, the three of us went to the grocery store to pick up some needed items for the week. While holding Chay and walking through the store, I would say "hi" every five or ten seconds. After a while, I heard Chay say "hay" and "ho", so I just kept repeating "hi". It took Chay a few tries but he finally repeated "hi" to us. I think he just had to figure out which way to say what he was hearing.