I just finished the Easter banner for our godly play room at church. Technically it was finished in Eastertide, though it won't get hung this year. The good news is I finished the Pentecost banner too. So we have the correct banner for a week.
I worked with a friend on these and we were going for simple. The Easter banner was done by freezer paper painting with gold fabric paint on cotton (the only white I had on hand). The Pentecost banner is just paintbrush streets of paint on red fabric (sateen I think, someone gave me a big piece of it at some point).