I make these the night before for my husband and I to grab and go the next day. The acid in the mandarin oranges keeps the apples from turning brown. Sometimes, I'll add half a banana to each one for more fruit. I either use nonfat vanilla yogurt or plain nonfat Greek yogurt with a little vanilla extract mixed in. And I don't peel the apples for the extra fiber. It's so simple to make....if you can cut up fruit, then you can have this simple recipe!