This is often a tough one for parents because many children are introduced to apples early and most juices contain some apple juice as an ingredient. The reason we ask that you don’t feed your child apples for the duration of lessons is because apples cause gas. Apples metabolize at a temperature of 104 degrees. This is the same temperature that they ferment at. This gas causes the child to be uncomfortable and feel full and no one works well on a full stomach.