In the comments of the kid-friendly kitchens post, Marta asked:
Anyone have a hack for improvising one of those Learning Tower things? They cost a lot.
I agree — a lovely product, but the price is prohibitive. When I was a kid, we just used one of those stepstool/chair thingies. In my grandma's house, the stool looked like the yellow one pictured here, and it doubled (tripled!) as my default high-chair seat at all family gatherings, and regular step stool for high cabinets. You can also get a more Home Depot-ish ladder type if the goal is a stable surface for standing.
Anyone else have ideas?