This is not a tutorial, as such. This is just a diagram of a quilt that I thought up last night for the comfort quilts I make for foster children. I don't know when I'll have time to do it myself, but I wanted to share the idea. Please use this for charity quilting or personal use only.
It is a very simple pattern, and measurements are given so figuring out the cutting instructions, etc. should not be hard for someone who has some quilting experience. House and tree blocks are fairly easy to find in books or online, or to work out on graph paper if one cannot be found in the appropriate size.
There is a 5" paper pieced tree block here: http://blockcentral.com/qb-tree.shtml
My mom made me a floor mat (not quilted) in a similar style when I was a kid, and she has made one for my son and nephew as well. The idea is to drive the toy cars/tractors down the sashing like a road. I think it would be cute to use different novelty prints in some of the blocks - farm animals, tractors, corn, etc.