17. An outdoor survival bracelet with a whistle, thermometer, fire starter, and compass.
Because hanging out among the elements is all about hoping for the best, but preparing for the worst.
Get it from Amazon for $7.59.
18. A glow-in-the-dark guide to constellations for endless hours spent stargazing.
No more arguing over which one the Big Dipper is.
Get it from Amazon for $5.95.