Liam and Mimi and Baby translation

Talking on the phone to Clay and Liam keeps repeating: Deck, No, Please~Deck, No, Please....
Clay said Liam I don't understand what you're saying. From my end of the phone I said I think he wants to go play on the deck please but he's afraid you're going to say No.  Clay asked him "do you want to go outside and play on the deck?"  and he said " YES!". Baby translation? But honestly,  what little boy doesn't want to go play outside if he's asked?