Nerf Rebelle Message Dart Refill (2 Pack) 16 Message Darts, 2 Pens, 2 Decoders When you're on a mission, take along these refill packs of Nerf Rebelle Message Darts and the special pen. They're the perfect way to conceal and reveal your most important secrets. This is a fun product since you can draw/write messages and also erase them. Write and send hidden messages. Double decoder reveals the secret message that you wrote with the special pen. Erase them and then send them again. They are fun, safe & the kids have a blast with them. They are soft, flexible but strong enough to shoot far distances. They don't damage walls, glass or fragile decorations in your home. As always, keep away from anyone's face. Kids love writing messages and then "sending" them to their friends, siblings, or mom and dad, via their "blasters". Or use them to blast secret messages to your kids. Have extras around for when the kids have big Nerf battles. Includes 2 packages. Each package contains 8 darts, special pen, and double decoder. Blasters and accessories each sold separately.