ages?
Get the small pizza boxes donated – have them glue felt/flannel to the inside – it makes it a flannel board.
have them colour pictures that go with a story.. use clear “map tack” to cover/laminate them… glue on sand paper or prickly side of velcro to the back….
Now they have a story board, and the pieces for the story – and it all gets stored in the board box….
Make shields out of cardboard – discuss haraldry a little bit, let them paint their shields.
If you can get a lot of plastic milk jugs / water jugs – they can be cut to make helmets. (depends on sizes of kids’ heads)