the problem I found with the suction cup plates was that they still try to lift them up and when they release off the tray the food now goes across the room cause the kid is pulling so hard. if its deliberate then put a stop to it ....take the food away when she starts that nonsense or give her small amounts at a time ....for the older ones that have decided to test me I have made them get down and pick it up then get back in their chair ..... you have to put on your mean face and be firm