Thanks for your replies everyone. Just to fill you in a little better, I have stabilized with tear away and the blocks turned out pretty well, and look good after the stabilizer was removed. I am just concerned that when washed they will kind of crinkle up. I did a trial hand wash of two blocks and this did happen close to the embroidery, (eg between the butterfly wings) this ironed out, but I don't want this to happen after every wash. There is satin stitch on the outside of the appliqued butterfly wings on each block.
Would it be crazy to have two layers of fabric (with tear away underneath) and leave the bottom layer in as a permanent stabilizer?
Thanks
PS its a kid's quilt, so I'm hoping it get used a lot and therefore would need washing from time to time