Fill Out Form DS-11 and Print It. Use our Form Filler tool to fill out your child's form on a desktop or laptop computer and then print it. Use our Form Filler to fill out your form and print it.For the best experience, use a desktop or laptop computer. Most children must appear in person at a passport acceptance facility to apply for a passport. The cost will vary depending on the child's age. Passport forms The forms are available at the travel.state. Please note that this form MUST be notarized. Learn how to apply for a US passport for children under 16. Passport applications for children under 16 have special requirements. Passport applications for children under 16 have special requirements.