I tend to agree with the point they’re making. One problem would be figuring out how to provide smaller arenas for children to play in. Soccer should be pretty easy, since it’s just a matter of painting the lines differently and having some smaller goals. The smaller soccer fields could be permanent installations in places where children play, perhaps near elementary schools.

Ice rinks, however, aren’t cheap. Smaller hockey rinks would require some more expensive modifications to adult-sized rinks, like removable board kits that can be slid on and off the ice quickly whenever the ice needs resurfacing and whenever the children leave and the adults show up.