You can have a fire. A candle will do. Even a symbol of a candle will be adequate. If your mom may have an unexpected reaction to you cleaning, lol. You and your friends could clean and rearrange your room. You can decorate with what flowers are in bloom this time of year. It's a time to clean up inside as well, to give up unhealthy habits. Symbols of these can be burned in a cauldron safely placed where it will not catch anything on fire.