This is one of the simplest instructables out there and you won't have to buy anything.
Step 1: Materials
The materials that you will need are scissors, a sticky note, cardoboard, pencil, eraser, needle, and a hammer
Step 2: Getting Off the Metal and Eraser
spin the pencil while hammering were the metal meets the wood. After about every 10 seconds of pounding wiggle the metal and remove if possible. If not hammer another 10 sec.
Step 3: Putting in the Pin
once you have removed the eraser and metal poke your needle through as straight as possible until it is as far in as it goes. (using a pin with a ball on the end helps a lot)
Step 4: Making the Tail
take your sticky note and cut off the sticky section and then fold it like a fan.
Step 5: Adding the Tail to the Pin and Eraser
fold the pushed together end of the tailand put it in the open end of the metal.
Step 6: Smashing the Metal
take your hammer and tap the end down until it is tight.
Step 7: Play Some Darts
make a board however you want. I prefer styrofoam, but carboard works too. Then tape you target on. THEN PLAY SOME DARTS!!!