I know how you feel because if it were my own personal quilt I would be ripping that baby out before you could say boo, but I would not fix this block for fear of really hurting her feelings. I would take some starch and press the thing into submission. With 40 blocks I don't think it will really show unless you are looking for it. If she is to make another block I would have someone sit with her and help her with each step.

Several neighbors asked me to teach a beginning quilting class. We (they) decided to make a red/white/blue quilt and raffle it off at the annual 4th of July picnic. Being new quilters, not all of the blocks were perfect but were forced into submission with plenty of spay-sizing and a good steam iron. One in particular was almost horrible but the maker was so proud. I fit all the blocks in (a miracle in itself) and believe it or not, the quilt brought in over $200 in the raffle. Never, never, chastise a new quilter -- simply praise and offer extra help next time.