First, I asked the girls if an orange would float or sink when put in water. Ella said "float". Arin said "sink because it is in water, but if it was in vinegar it'd float" I think Arin was remembering science projects that we had done in the past! So Arin put the orange in a vase of water and it floated to the top.
The girls took turns trying to make it sink and stay at the bottom, but each time they took their hand off from it, the orange would shoot back up to the surface.
After cutting an orange in half, I very carefully pulled the orange sections out of the rind, leaving the white part in the middle in tact. I should have let the orange rind dry out overnight, but we wanted to finish this project today. I filled the empty half of the orange with olive oil. Then, after several tries (this is why we should have let it dry out longer) we were able to light the natural wick and create an orange peel candle. The girls liked this activity, but I really think that the concept impressed Andrew and me more.