"Lets go out and play!" that's what i would say to my young students in my past Aviation class. Leave the text book and put pencil down go do some fun stuff. From running around, throwing paper planes out in the open to riding around onme mtb2 bicycle around the building. Even in my adult age me and circles of my friend would go outside have fun R/C model flying, do aerial photography, racing, FPV and other fun stuff. At time being solo i would cycling around places, jumping through stair cases on my mountain bike, downhilling or trying to balance on the log after working hours. Being playfull regardless of what age you're in is actually good for mental growth. When you go out to play you'll learn how to handle and interact objects and living things around you. In an enrich environment where you interact during play your body will have increase in glial cell activation...that means new brain cell generated because of new experience. This also improve your body cognitive performance too because you're surrounded with the environment you play around you. Playbplay 1 is acutally same as schooling yourself, learning new things. So its essential to keep your self being playful even though you're into old aged. Which is why having a hobby to keep you entertain and playfull is a good for your mental development. This is why you see lots of man and woman get smore creative and brainy when they have passion on their hobby and do unique creative activities. You can say this month of June i've been so playful and manage to complete lots of fun projects as seen in prevous posting. Good stuff!