This is a simple, less than 30 minute project I put together after one of the heads of my (very inexpensive) arrows fell off after constant stress on the head. I used a new arrow for the sake of demonstration.
DISCLAIMER: I AM NOT RESPONSIBLE FOR ANYTHING BAD THAT HAPPENS WHEN USING THIS ITEM. IF (NOT) USED PROPERLY, IT CAN RESULT IN UNSEVERE TO SEVERE INJURY. YOU HAVE BEEN WARNED.
All you need is a target-style, hollow arrow and maybe a pair of pliers.
For the darts, you need Q-Tips and a pair of scissors