Appropriate age for kids to do SASS? in SASS Wire Posted June 24 It's a legitimate cause for concern, but one that can be addressed. I started my middle son at 7 years old and I was always very careful to be sure he had his hearing protection, not just that it was in, but that it was in correctly. Lead is an equally important concern. If they're going to shoot CAS, they need to have their lead levels checked regularly.