Without a doubt, the ladder was the most challenging toy to build to date. Getting all five of the ladder rungs in place took more effort and patience than most young children would have. And it took a fair amount of dexterity, too.
I put all the rungs through one of the steel braces, which wasn't too bad. But then I had to get all five of the wobbly rungs to line up so they would all go through the holes in the second steel brace. Yikes!
Cinching all the collars was a little challenging, too. Sometimes pushing down on the collar on one side of the ladder pulled the rung out of the other steel brace. Hoo boy!