We got a separate base for the house (pictured below). It can go up and down to any height. The seat can then come off and go onto a different set of wheels for when we are out and about.
[Yes, the harness does appear to be choking Miss Elisabeth in this picture...I readjusted it shortly after the photo was taken, so not to worry.]
Next on my to-do list: figure out how to doll it up a little because right now it is a little boring. I am thinking some stick on jewels might just do the trick....
Happy February!