There are 3 key issues. First, the viral gene injected into your children cells will force your child's body to make toxic spike proteins. These proteins can cause permanent damage in children's critical organs and can trigger fundamental changes to their immune system. These damages, once they occur, are irreparable. You can't fix lesions within their brains, heart tissue scarring, or a genetically reset immune system, or reproductive damage.
The second, is that we typically need at least 5 years of testing and research before we can really understand the risks. Do you want your child to be part of the most radical medical experiment in human history?
Finally, your children represent no danger to their parents or grandparents. As a parent, my recommendation to you is DO NOT GIVE THEM THIS UNPROVEN VACCINE.