As a parent or caregiver, it's important to consider when it's appropriate to transition your child from a cot or crib to a bigger bed. But what age should you stop using a cot? The answer can vary depending on several factors, such as your child's development, size, and sleep habits. Some children may be ready to move to a big kid bed as early as 18 months, while others may need to stay in a cot until they're 3 or 4 years old. It's important to keep an eye on your child's growth and development and make the switch when they're ready. So, how do you know when it's time? Let's take a closer look.