Why it can still be fun to grow older

Because you can get Lego stuff as birthday present, of course! And even sometimes train your intelligence (and/or strategy skills, possibly, i.e. when you haven't studied physics and it's hopeless anyway): Thanks to my father who always was very supportive of my creativity (which most of the time translated to improbably ugly spaceships designed for universes where fundamental interactions are slightly different), here comes the Lego chess game!

Variations on the theme:

There can be only one

Twist and chess

Chess-nuts tree

After the show

Chess and math