A few days ago, we talked about the environmental (sensory) factors of the bedtime routine and how they contributed to either greater comfort and ease (making it more likely to fall asleep) or discomfort (making sleep less likely).
Take this the final step and consider the bedroom.
Is your child's bedroom calm and soothing? Are the colours restful? Do they have things that make them feel safe and comfortable? Or are there objects that actually scare them but they're just not telling you.
Do their sheets feel soft and comfortable? Is the room dark enough for sleep? Is it quiet? If there is a smell, is it a soothing one?
Try talking to your child about the sensory qualities of their bedroom environment - what it looks, smells, sounds and feels like to the touch - and whether those qualities help them to fall asleep.