Little monkeys

If it hasn't been said before, these boys like climbing on stuff. Big time. Up until now, it has been approved stuff (like playgrounds) or little unapproved stuff (like furniture).

Now they have discovered low hanging branches. They want to climb up a little way into the trees and hang upside down like monkeys. Based on my success at stopping their climbing to this point, I don't think I am going to be able to discourage this, so perhaps I should work on
teaching them to land instead of fall.