Generally, babies start to learn to use two fingers to pick up things around 4 to 5 months old. When introducing complementary foods, it’s important to consider the baby’s age to provide appropriate nutrition. For example, soft rice, egg yolks, and fruit purees can be introduced between 4 to 6 months, while soft noodles, tofu, and rice dumplings can be added between 7 to 12 months. Additionally, infant nutrition products can also be chosen as supplements.