A child visa for UK allows children under 18 to join their parents or guardians in the United Kingdom. To apply for this visa, the child must meet specific requirements, such as proving their relationship with the sponsoring parent, providing evidence of adequate financial support, and satisfying the health and character requirements. The child visa process can take several months, so it's essential to prepare the necessary documents in advance. Parents and guardians seeking a child visa for UK should carefully follow the guidelines provided by the UK government to ensure a smooth application process.