Using this Nerf Fortnite Dual Pack is a breeze. For the Flint - Knock blaster, first, front load a dart. Then, pull back the hammer to prime it. Finally, pull the trigger to fire. For the LP blaster, front load the dart, pull back the slide to prime, and then pull the trigger. Make sure to wear eyewear (not included) for safety when playing. After use, keep the blasters in a dry place. If the darts get dirty, you can wash them with mild soap and water. This set doesn't require batteries, so you don't have to worry about that. Have a great time playing outdoors with your friends!