The day of Pentecost is considered to be the birthday of the church of Christ. It is the event that changed the whole world. Jesus breathed his spirit on the apostles and stirred up a flame that has been burning ever since.
I love this Holy Spirit dove craft! It's easy enough for little ones and can be expanded to cover the Seven Gifts of the Holy Ghost. Use it for Pentecost, Baptism, Confirmation and other lessons on the Holy Ghost.
Really simple--small yellow plates (purchase at any party store or some grocery stores), paper cut in the shape of bows (can be positioned as bow ties too), and sharpies to draw the faces of your choice.