You may have heard what you stated, but the elimination of Child's pricing was only in regard to the WDW Annual Pass. An Adult's Annual Pass and a Child's Annual Pass are now the same price. This change happened in 2013. An incidental reason for this change, and not the only one, was some people who visited WDW frequently would buy just a Child's Annual Pass to get free theme park parking for the car showing the pass. It was around $50 cheaper to get the Child's Annual Pass.