For kids, testing the limits is a developmental imperative. Why? They do so to help define their boundaries. Without limits, kids would be perpetually anxious and fearful. Boundaries and limit-setting by us parents give them the calm and security to function in the world. If your boundaries are fluid, she will try to take advantage of that. Fluid boundaries can lead to a sense of entitlement, where she believes she can do what she wants, whenever, with no consequence. Boundaries set responsible expectations on your child's behavior and helps them navigate the world better. When your child tests your limits, firmly set them with reward and consequence, finding yet another teachable moment