This is a small project to do in about 15 min if you are bored. These can be fun to use in mini battles with your friends or whatever, that's what I do. It's really easy and really fast, and cut me some slack, it's my first instructable, ok?
Step 1: Gather Supplies
You will need....
1. a long cardboard tube (best to use one from wrapping paper)
2. bullet/ missile tip from a nerf gun or something like that...needs to be small enough to fit in cardboard tube, but big enough to be snug in there. you can use many different things for this part, see what you have and pick the best one
3. (optional) rubber bands to put around the cardboard tube for grips
4. (optional, but highly reccomended) lots and lots of duct tape to put on cardboard tube. this helps prevent rips and damage to you spear