Coco has become quite skilled.
He got a notepad in a birthday goody-bag and was writing in it. Madge asked him what he was writing and he said, "It says, 'I love Madeleine because she lets me play her Nintendo DS.' [pause] Madeleine, can I play your Nintendo DS?"
And yes, they say, "play Nintendo DS" without an interstitial preposition (on, or with) - as if it were a musical instrument.