I'm still the only one who can understand him

"Chetch! Chetch!"  Danny comes walking into the room with a half-deflated miniature basketball held on top of his head. He throws it to me, and I "chetch" it. I half toss - half hand it back to him and he holds it over/on his head again and walks out of the room calling to his brother to play with him. "Tah-ee! Chetch!"