Speaking as an atheist, Easter Egg hunt? Great!
Being inclusive (inviting everyone?) Fabulous.
Handing out flyers in school? I’m not totally comfortable.

Who gets ‘access’ to the kids and who doesn’t? It is almost certainly a nice gesture on the part of this church, but it is advertising. Is there a school policy about what groups can and can’t distribute flyers to the kids?
For the record-I’m not crazy about the various commercial items, however educational, that are promoted in many schools.

I do understand Muslims being touchy about it, though.