Cast on 60 stitches.
Knit garter stitch until you´ve knitted up almost 60cm, assemble the stool. You now have a rectangular piece.
Cast off loosely.
Assemble the short sides (60 stitch side) as neatly as you can.
Assemble the first long side. This is supposed to be the top or the bottom of the stool. Put the needle through the end stitch of every second row and tighten, tighten, tighten! Repeat on the rows in between and tighten until there is no hole in the middle.
Stuff the filling into the stool. Assemble the other end in the same manner as the first.
If you have questions or doubts, please let me know.
Hope you like it!