Think of multi-age groups as “families” of learners. And just like in real families, older children help younger ones master new skills, learn by example, and have a chance to practice what they’re learning. Older children enjoy being the “big kids” too and having an opportunity to show their stuff! Give them the opportunity and they’ll rise to meet your expectations.
We know there are those out there running their programs by age. If that works for you, go for it. But know that your older kids will finish activities sooner than your younger kids.
Let us know what you think, and what questions you have. And let us know how else we can be of service. God bless you and your ministry!