Step Stool with Wedged Through Tenons

Sometimes we get a little carried away with projects, but that's half the fun. WoodNet Forums member rausrh says,

Here are a couple of step stools I made for my son. They are mostly made from lyptus, but I ran out of that so I used some maple for the tops of one. I used maple for the tenon wedges. This was my first time using through tenons as well as my first time with wedged tenons.

I used a mortise machine to do the mortises and found that to prevent blowing out the back side I had to use a fresh area of the backer board for each plunge. This may have been because lyptus is so splintery.

More photos and comments here.