A second breakfast is a quick meal that requires little effort. However, when preparing it, parents want to make sure that their child eats something not only tasty but also healthy and wholesome. At the same time, it is worthwhile to take care of immunity in autumn, and the work of the immune system is strongly dependent on the supply of essential fatty acids. So what fats should a toddler's second breakfast contain to make it as nutritious as possible and tailored to children's needs?