"Ran-Tree" means: ' The beam over the fire on which pots, kettles, &;c. are hung. Cai.', Rxb. (Jam.) Cf. randle, sb.. This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.