If it is a little boy, you can send some cars, robots, digital babies and so on. And little girls can send dolls, small puzzles and other toys. Fairy tales or popular science books, because children like fairy tales and have a curiosity, so children who send fairy tales or popular science books will also like them. Clothes, if familiar, can buy some clothes for children, because children like new clothes, so they can buy clothes. Snacks and sugar can be avoided, because parents may not want their children to eat too much sugar, so they can buy some snacks that other children like better. Smart watches, small hand rings, many children like these wearable decorations.