Pentecost Pinwheels that catch the breeze...

White plastic writeable/paintable pinwheels are available for cheap in bulk (check Oriental Trading). Kids can first write messages on parts of each pinwheel and paint the other parts of the pinwheels with a very thin coating of acrylic paint (acrylic sticks to the plastic).  Would make a good Pentecost Sunday sidewalk display (like Xmas luminaries) that can go home to encourage Pentecost behaviors (spreading the word).  

Pentecost "We are One in the Spirit" spinning wheel

a new take on an old toy known as "Newton's Color Wheel."

In this video, the teacher used a pre-printed paper to make both sides of the disc (which they glued to a circular piece of cardboard.   I'd recommend having the kids put key verses on one side and using traditional "flame colors" that will blend when spun.

On the other side of the disc you can demonstrate "We Are One in the Spirit" by writing names of different people/churches/denominations/cultures, etc. in the different color sections then spinning.  Make several to share with other kids and adults in the church.

Spirit Blown Pentecost Message Artwork

Supporting Members can see the Art Workshop lesson plan in the Writing Team's Pentecost lesson set that describes how to paint with your breath (spirit), and include a Pentecost message in the artwork that doesn't get covered by the paint.