Toys for cockatiels should be rotated regularly to maintain the bird's interest and encourage mental stimulation. While there's no fixed schedule, changing toys and perches every few weeks can help keep the environment engaging. Frequent updates prevent boredom and can contribute to better mental health by providing new challenges and stimuli. Additionally, inspect toys periodically for wear and replace any that are damaged to ensure safety. Keeping a variety of toys on hand makes it easier to rotate them effectively and keeps your cockatiel lively and happy.