Any ideas on cool stuff for a kids bedroom that is both fun/exciting and relaxing?

About to start decorating 8 year olds bedroom. She sleeps with me in my bed pretty exclusively at the moment. I don’t want to pressure her into going to sleep in her room but I think it would ultimately be good for her if she does.

So I was wondering if there’s anything specific I could do with her room that will make it exciting for her & get her to want to sleep in there. Getting one of those high up beds is not really an option right now because she has nightmares at least a few times a week & sometimes gets up still half asleep, so it would freak me out with having to navigate a ladder. I just want it to be fun and feel super safe & relaxing for her.