Personally when my LO refuses to eat what is offered and he's just playing with it or throwing it, etc... I will remove his high chair food tray for a few minutes and say "oh you're not ready to eat". I will then place it back after a few minutes and say "it's time to eat". If he again refuses I will repeat. I will repeat 4 or 5 times if I know he is hungry and if he still refuses then I end the meal.