We played this walking game before with little success, as Simon would not dare to take steps without holding on to something. However, this evening, when we played the game before supper, he was a little more confident and took a few steps. When we passed him back and forth again after supper, he was getting better already. Later that night he was really starting to get the hang of it.
The reason he is only wearing a diaper is because Zac started to give him a bath, but then he appeared to be having a bowel movement, so Zac yanked him out prematurely. So we gave him some more walking practice until he finally pooped.
And, from the archives, here is the video of Alice learning to walk at 10 months old.