The word of God does not need to be made relevant in order to reach a people or generation. The word of God is living. Introduced to the Word, and allowed to interact with the Word, beleivers will reach personal revelations by the Holy Spirit. What separates the people of God, what segregates them by age and culture, are the things which are not the word of God. When their are only old people going to a church, out of a normal population, it does not mean that only the old people believe in God or that God needs to be updated to appeal to younger people. It means that something cultural is bringing these people together, not something spiritual.

Offering different services to different ages is very close to advertising the absence of the Holy Spirit from your gatherings.