"Was dis?", "Wow!" and "Coooooh-l"

These are our funniest new additions to language in the last couple of weeks.

"Was dis?" is usually accompanied by a very suspicious look like I'm trying to slip something in his Rice Chex.
"Wow!" is a very important word reserved for only the most stupendous of things (like a big fall or a loud Choo-choo).
"Coooooh-l" is only when you blow a big bubble or play with someone else's super cool toy....so far.