The American Academy of Pediatrics recommends that infants be placed in a crib, bassinet, or play yard that meets current safety standards for the first six to eight months of life. After this point, you can consider transitioning your child to a toddler bed if they are showing signs of being ready (such as being able to climb out of the crib or showing an interest in climbing).
It's important to note that every child is different, and the age at which you choose to transition your child from a cot bed to a bed will depend on their individual development and needs. Some children may be ready to make the transition as early as 18 months, while others may not be ready until they are 3 or 4 years old.
It's a good idea to continue to use a crib, bassinet, or play yard until your child is at least two years old, or until they are showing signs of being able to climb out of the crib or play yard. This will help ensure that they are safe and secure while they sleep.