Well, it might not exactly be the fine woodworking we often see here, but this is a functional piece that I managed to somewhat quickly produce.
The back story is that my son (now 17 months), like most, is very curious about everything that involves the kitchen and food prep. He is too heavy to comfortably hold for long while cooking, and while he is sturdy on his feet, we cannot really have him stand unattended on a chair (our tiles would be very unforgiving in a fall). My wife has asked for some time for me to build something like the "learning tower". She was putting down serious threats to just buy one ($200), so I had to find time to get to the shop (my winter schedule is very busy, and free-time has been sparse to nonexistent).
Nothing too complicated here. Mortise-tenon for the sides/rungs and knock-down hardware on the front/back cross pieces. It uses a sliding system to move the platform to different heights. I don't like the plywood construction of the commercial version this is copied off, so used solid birch in the interest of using local lumber. Given its mass, there was no need for the feet extensions found in the commercial product (which I think would be an annoying toe-stubbing and tripping hazard). I also made some modifications (smaller dimensions) so it would best fit our kitchen (i.e. up to and in-between the island).
Finished with General Finishes water-based poly.
Measures: 37" (H) x 24"(W) x 23"(D)
Overall, a couple of things I could have done differently, but I'm pretty happy with the results and how the design came together. Questions and comments welcome (though, honestly, my son loves it so I don't really care what anyone else has to say )