Our daughter is fast approaching 2 years old and had learned the word "chair." She wanted her own, clearly.
In addition to being my first brag-worthy project, this is the last thing I built before I got my Kreg Jig, but even without, I'm quite satisfied with the end result, and it will support me sitting in it (at over 200 lb) so I did something right.
I ripped down some 1x8 to make the lumber required, so it's not exactly per the plan, but it's pretty close. I also made the back legs of out ripped 1x4 because I felt it looked nicer, and added the brace between the front legs only in order to maintain stackability. (For I will be making a few more of these.) My favorite personal modification is the accent heart in the back slat.