An apple cinnamon cake is a comforting and healthy choice for a kids' birthday celebration. This cake is made with whole wheat flour, grated apples, and warm spices like cinnamon and nutmeg. The grated apples add moisture and natural sweetness, while the spices give it a cozy flavor. You can serve it plain or top it with a light glaze made from powdered sugar and apple juice. This cake is a great way to incorporate fruits and fiber into your child's diet.