Solar Mason Jar Lights -- add tops to your mason jars and use solar power to light up the outdoors.
This is The Best Homemade Burn Salve! Just a few simple ingredients and you can save your skin from minor burns.
Take that mosquitos!- Mosquito trap - Cut the top off a 2 liter bottle. Invert the cone and place it inside the straight part of the bottle. Glue the two pieces together. Add 1 tsp yeast and 1/2 cup sugar to some luke warm water, and pour the mixture into the bottle. Mosquitoes are attracted to the carbon dioxide that you exhale. The yeast feeds off the sugar and emits the same gas, so the mosquito enters the bottle, thinking she will find food there.
I think this is a must have for travelling...would save a lot of ziploc bags! Keep the mess in the towel, then throw the towel in the laundry when you get home from your trip.