I give you permission to act your shoe size, 'cause who wants to act their age? And I think it's quite alright to ask for a night light when the bed monsters are let out of their cage.
I see nothing at all wrong with belting out a song in the middle of a long and boring Monday. And I offer no good reason why the cold and snowy season should mean you can't enjoy an ice cream sundae.
I've no problem whatsoever with playing in bad weather or even making pancakes in the mud. And I feel it's quite okay to save for a rainy day as long as you aren't waiting for a flood.
Growing up's exciting and it probably seems inviting, but growing up too fast is not too clever. You'll know it in your gut when you're really ready, but if you're lucky you'll feel like a kid forever