Always the best sport for overall physical development. And, as the first image shows, you don't have to be in a gym to get some training in!  A talented 8yo:  ...and this one is 9yo - doing iron cross!   And, finally, an important message from the gym:  

Work-life balance? The right amount of training versus leisure. OK - but today we are focusing on actual 'athletic' balance. Handstands and more - which require muscle strength and flexibility - and a great deal of practice! Admire the success we show here - along with one or two poor shapes but good early attempts. We'll start with the mens four (in acrobatic gymnastics) from Southampton UK... balance, for sure - and trust in your partners:  And finally, staying with young future performers, Ratmir does it his own way: