Struggling to sleep

Hello, I was just wondering whether anyone has any experience in dealing with a child who struggles to settle down at night? The routine to bed seems to be a problematic part of the day and I was wondering if anyone has any tips or methods that can help out a 5 year old. Does anyone have any reward systems that encourage their child to stay in bed? And do sensory products really help in encouraging a child to sleep on their own?

Thank you! Laughing