To make a long story short: long cast (mid-thigh to foot) for 6 weeks. Non weight bearing. Then hopefully a short walking cast for 4 weeks. He can't walk but thankfully he can crawl. Should he choose to, that is.
He either fell off the top bunk or slipped getting onto the ladder. I was right there but I had my back turned. He's been climbing up and down that ladder for 2 years.