I've been trying for months to teach Bardo to climb down stairs. He had a long crawling period, so I thought for sure he'd learn before walking, but he just kept on trying to shimmy down head first for a long time. No matter how carefully he shimmied, his efforts would end with me catching him (or me sometimes letting him fall down a couple of steps). This week Pippi used the water balloon technique to get him down the stairs safely. She'd show him how to crawl down backwards and then say, "Come on. Come get the balloon." I've shown him several times how to do this and I've even put his body in the proper position. I never thought to use a water balloon, though.
Note: The water balloon survived the entire trip down the stairs. Phew.