This is how you use two pens and a few beads to make a blowgun and ammo case.
Step 1: Remove the Insides.
Remove both pens insides: the ink cartridge and spring. And put them back together, but leave one end of one pen off.
Step 2: Find Ammo.
Find beads that fit in both the pens snugly but not tight.
Step 3: You're Done
Now insert a bead in the pen with no end and blow through the pen. Do Not Aim At People Or Animals!! Use the other pen case to store your ammo.