I've just made an 'anywhere seat' for granddaughter - as seen on marzipan.com
It took about an hour and my daughter is very pleased with - furthermore it cost absolutely nothing as was made from leftover fabric from other projects.
These are the materials needed to make this very useful item:
(1) In outer fabric:
Cut one long piece 37" x 6"
Cut one 19" x 11"
Cut one 5.5" x 4"
(2) Do the same for inner fabric
(3) Do the same for the batting
The instructions on how to make up the seat are at: http://www.madebymarzipan.com/?tutorial=anywhere-chair#sthash.BmkmYVSI.dpuf