We had some Ikea chairs (most of our house is ikea) for our dining table (also Ikea) - they're a great shape for putting the booster seat on for C. Unfortunately, the seat is covered in a felty fabric and I can't describe the mess..... It was just irritating that I couldn't get it clean! So, with my left over PUL from the Ikea LATT project, I recovered a seat!
There are 4 screws underneath, I just undid those, cut out the fabric around the seat pad, and hot glued the fabric to the chair, making sure not to cover the holes needed to screw it back to the chair. Wrap it tightly!
Screw it back to the chair, and you're done!! Yay!
I am planning to do another one for when H is in a booster seat rather than the high chair.