Letting your child participate in competitions is good for his/her development. Having an award is already worth much appreciation from you. IT's good to have a top prize, but even if it is a participation cert., it still shows that you as a parent are willing to expose your child in different aspects and thus your method of developing your child can be seen.
My daughter has no real certs at all but luckily, she was accepted by all DSS and private schools we have attent for interview. So I guess the schools care about the interview more.
Dont' worry too much to prepare the cert! Relax! :)