I just happen to have these things! I got them for my son a year ago or so from....you guessed it....Target!
I have no idea what they cost then, but here's the pics of them. Oh yeah, nevermind the hinge on this set, cuz my son pushed the top back too far and stripped the hinged top plumb off of the stool/steps. I had to rig it with a new hinge to get the top to stay on.