Fire lighters made from dipping various things in wax, my kids love making them and we time how long they can last. As well as recycled candle wax we have also been experimenting with beeswax. The lip balm we made from beeswax and coconut oil, is also pretty handy on wood. I agree with putting together kit is kind of an activity, they have their own tinderboxes which they love playing about with. I also put them together a bag with den making materials.