One of the most ubiquitous fireworks is also one of the most dangerous, according to USA Today. Accounting for up to one-quarter of the 12,000 fireworks-related emergency room visits every year, sparklers burn at 2,000 degrees — hot enough to melt some metals or set clothing on fire. Take extreme caution when giving them to children — especially kids under 10. Keep a bucket of water nearby to cool the spent sticks, which can remain hot enough to cause second-degree burns long after you stop spelling your name in light. Also consider safer alternatives such as glow sticks or bamboo sparklers, which cool down fast.