Awesome idea:birthday party decor,take diffrent color table cloths and tape them to to ceiling like that. Then tie 3 diffrent color balloons together and tape them to another set of balloons then tape the all the balloons in the middle of the table cloth.
This link is dead, but here is the idea.You could take a toilet paper roll and cut into a crown shape. Thread it thru a headband. Add some color, bows, stickers etc! <-- could work as a princess party project but the crown in the picture is clearly felt