Sadly, that describes a lot of Evangelical churches when I was growing up. Vacation Bible School has become “big business” with massive layouts, bounce houses and rides, and other attractions. Instead of it being for children of members, churches advertise to try to attract non-members. Some churches even CHARGE for it.
As well they should. There is nothing wrong with advertising VBS to non-member families. When I was younger, my family did not go to church, but I was allowed to go to VBS because it was FF....fun and free.
As I got a little older, I saw the sign on the local church for Sunday school, and figured Sunday School had to be similar to VBS. I had also attended VBS there. I started showing up and attending Sunday School. Then I started staying for the church services. I was the only one in my family to go to church. Today, with children of my own. I encourage them to go and participate.
VBS reaches many children whom otherwise would not be exposed to Christ.
"But Jesus said, Suffer little children, and forbid them not, to come unto me: for of such is the kingdom of heaven." Mathew 19:14