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:

• half a yard strong cotton fabric for the outer
• half a yard cotton fabric for the inner
• half a yard of batting
• 5" Velcro

(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
see also: 
http://blogs.babycenter.com/products_and_prizes/7-things-for-baby-you-can-make-yourself/