Take either an IKEA Lack side table or coffee table and make a bench or footstool. If you were making a footstool you could always cut down the legs if it was too high. Right now, the green side table is only $7.99. Would look great matched with a green colored Amy Butler fabric. Depending on what you have on hand and what kind of fabric you want to use this project can be anywhere from $0-$53
Upholstery tacks $4.25
Lack Table $9.99
Amy Butler Fabric $11.50 (shipping included)
Foam Core $15 (1" thick when doubled up); $24 (2" thick when doubled up) (both using 40% off coupon)
Polyfil $2.99 (with 40% off coupon)
Just glue or staple foam core to the top and sides, cover with fabric. Use upholstery nails to hold down fabric. You could even add tufts with buttons by stapling down the fabric and foam. Here are some image ideas to get you started.