that sounds like a great idea. sometimes we can be very tired of our own scraps.
My DH reminded me of a couple of points I should have made.
1. If your foundation is an old sheet or something like that, it is a good idea to stabilize it with startch or sizing before you begin.
2. If you are not comfortable working with bias, it's probably a good idea to stay stitch (machine baste) the edges of the block less than 1/4" from the edge to keep everything in place and stable until you sew the blocks together.