I found a cute John Deere quilt. Even though it’s made from a panel, you could do it in applique. The tires could be vinyl. Use rickrack for the barn siding. Make the tree like PaperPrincess suggested.
http://baby-quilt-queen.blogspot.com...ohn-deere.html
Check out the baby quilt at the bottom of this blog. She added a 3-D border.
http://oneforawish.blogspot.com/2011_07_01_archive.html
Animals made of yo-yos
http://www.youtube.com/watch?v=Bhg0xOj25fM
Other ideas:
soccer ball/football made of faux leather
tree trunks/branches of rickrack
mustache of fake fur
owl with sew-on wiggly eyes