Don’t be afraid to like childish things! Liking childish things doesn’t make you childish! Avoiding or not making time for your responsibilities FOR childish things is what makes you childish! There is nothing wrong with enjoying yourself in life while doing the things you need to do. If anything it will make the things you need to do easier and more enjoyable! For example, I love pokemon. I don’t consume myself in it, but there is nothing wrong with going to the grocery store or working out in pokemon attire. It makes me a little more light hearted and happier and it also reminds me of who I am! Enjoy and accept yourself! Enjoying yourself while making progress will only help you love yourself more!