Go to a glasscraft shop and look at pretty stained glass, fused glass, etc.

Put on an outfit with the goal of wearing as many colors as possible at once.

Drink a glass of orange juice with a pinch of powdered cloves.

If a sunny day, go outside at noon, close your eyes, and face the sun for several minutes.

Treasure hunt! Have the girls hide some items (beads, small mirrors, jewelry, candies) around the house, and you go hunt for them. (Of course, it would probably be wise for them to write down where they hid everything, just in case you don't find it all....)

Do silly dances.