What immediately comes to mind for me? Learning.
More-so, the act of nourishing your curiosity.
Without meaning to, kids persistently confront what makes them curious. The by-product is more inspiration to pull from, more ideas, more activity, and more playfulness.
Rather than sit in a room ruminating away, try to nourish your curiosity. Even if your next big idea isn’t sparked by it, at least you’ll have had a fun time.