Our chiropracter told us that we need to hold Bunny upside down for 90 seconds a day to help her back stay aligned--especially since the typical way to change diapers (pulling the baby's bottom up by the ankles) is bad for their backs. Anyway, we don't usually remember to do it that frequently, but every couple of days one of us will remember, and boy, she loves it! She just thinks it's the best thing ever. Especially on this particular day when she had a very unique view of daddy's face!!!