Whether a child will be called to testify will largely be determined by how old the child is, and what kind of claim you are pursuing. In Florida, children under the age of seven are generally considered to be too young to be guilty of negligence, so in cases involving injuries to younger children it is rare that they are asked to testify.
Additionally, in cases involved allegations of sexual or similar abuse, there are legal protections that may keep your child from having to testify or may allow for special arrangements to be made to protect your child.