Fill out your form(s) online and print it. All required supporting documents for the form(s).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. Use our Form Filler to fill out your form and print it. For the best experience, use a desktop or laptop computer. Step 1: Complete and print the DS-11 form. Do not sign the form. Bring the completed, unsigned DS-11 form and pay the fees for your child's passport. Make sure to bring 2 checks.