Parents Corner now introducing the Hedgehog Night Light. Having a night light on for your toddler could be that added reassurance when things start going bump in the night. Nightmares can begin as early as 2 years of age and when nightly fears develop, adding a night light could provide some comfort to your child. Understand why they need it: what is scaring them and be sure to address the core issue first. If your child needs the night light for comfort, let them have it. If it means helping them feel safe and secure in their environment and promotes better sleep for all, then it promotes better sleep for you too.