Hi Helen,
I am 39 and don't have kids of my own but when I do find any available (!) - (only joking, have a specific pair that are a friend's daughters) I go nuts! I recently had a stuffed dog made at The Bear Factory named Tiramisu and the girl that stuffed him made me pick a heart before she placed it in, touch some buttons to add 'love', 'laughter', 'kisses' and 'friendship', hell she even made me jump around 3 times when she was finishing sewing him up! In all honesty I like to do things like that. I was in CODA for many years and from what I remember, getting in touch with the inner child and providing things for him/her was compulsory.
Other than that, I dance (at the privacy of my own home!), sing and get really passionate about things in general.
Well, you may feel that you are 'too old' for certain things but creativity - I think this is what you want to tap into I think you're saying - doesn't have any age restrictions. You could dress up like a fairy anytime. Think of older actors who dress up and play roles on tv/cinema etc: if this is not 'play' then what it is?
P.