I work for a board certified plastic surgeon (www.DrMichaelBogdan.com).
Mederma is what he recommends to his patients. Vitamin E Oil is an alternative that is less expensive. If it looks like an open wound, use Polysporin or Neosporin until the scar forms, then start with the Mederma. Scars that are pink are still healing, so using sunscreen is also VERY important. Scars turn white when they have finished healing. The Mederma for kids should work fine. No worries...he'll be ok:)