This Tchaikovsky opera opens with a scene in a park where children pretend to be soldiers before the actual soldiers walk in. Here it is in Legos.
You can learn more about this opera here.
You can listen to the broadcast here.
Every Saturday Night, Capitol Public Radio's Sean Bianco plays an opera from cover to cover. And I make Lego recreations of the action. You can listen with me every Saturday from 8 pm till midnight on capradio.org.