We purchased and installed the swing set two weeks ago for our grandchildren that range in age from 2 1/2 - 4 1/2, and they love it.  Our only concern is the ladder leading to the clubhouse.  As the child climbs the arched ladder, there is 10" opening between the top rung and the clubhouse platform, which the child can easily fall through.  I contacted Lifetime and explained the situation.  We feel an additional rung at the top of the arch would prevent our grandchildren from falling through.  Lifetime advised they aren't able to send the requested rung because it will void the warranty and potentially be a safety issue.  Isn't the 10" gap that my grandchild can fall through a safety issue?  Wish they had a better answer.