Addendum to Natural Helpers

Someone asked me about the puzzle, so in answer I will try to describe the scenario.

There were probably about 20 kids of all different shapes and sizes, three wooden islands, and one plank of wood that was (purposely) not long enough to simply set down as a bridge. The objective was to get us all across.

I suggested that we have the largest of us anchor the plank, which he did, and as the middle island began to fill up, we realized we would need to do it in stages, keeping enough of us on the middle island so we could anchor for our big guy, which involved passing the plank.

My solution was a little cumbersome which is why I am certain there would be other (perhaps more elegant) solutions. But it got us all across, and not milling around looking helpless, so there's that.