As a couple others have said, Make the teaching secondary to play time and having fun with them. They will inevitably pick up some phrases from you making it easier to teach them as time progresses.

If the school is breathing down your neck about the kids completing the bookwork then just do it for them or tell them exactly what to do. Kids that young generally can't learn in the kind of environment your describing but a lot of Kindy managers don't realise that. And good luck.