What's he saying?

Ari can't talk...yet.
But in the past week he's developed the cutest little habit - he tells off everything around him.
Mostly he's a smiling, happy boy who makes gorgeous little squeaks and squeals. But a couple of times a day he furrows his little eyebrows and he lets fly with a barrage of baby gurgle.
So far I've seen him tell off:
1. His green rhino toy hanging over his change table.
2. His rattle
3. His dummy
4. His hand
5. My hand.

God knows what he's saying to them.