Box Clever - S4.E4

Johnny discovers the secrets of Doctor Who's Tardis, a box that looks like one but isn't and a machine that makes boxes quicker than you can. Also there's a disappearing box, a multiplying box and a box that's bigger on the inside than it is on the outside. Meanwhile - box clever with this. Five balls in a box -can you give them all to five friends so one remains in the box ?