Shoot through bucket reel. Cut the top off the bucket leaving the rim in place on either side.
Attach 2 "L" brackets with rivets or nuts and bolts. I used nuts and bolts so I placed them with the domed head on the outside of the reel and the shank going to the center of the spool.
The "L" brackets should be placed so the hoop is centered around the arrow. Wrap the brackets with electrical tape to prevent scratching limbs.
I haven't done this but a drop of glue would keep the nut from coming off. Hasn't happened yet but with kids it might be a good idea.
The string holding contraption. This one is a piece of strapping material but any springy type of material should work. I curled one end so it would wrap around the rim. I then heated the other end and melted it through the plastic.
The first couple of wraps of line will hold it in place. If it is too tight on the shot just flex it up a tad.
Only tools need is a hacksaw to cut the bucket, screwdriver and a wrench. If they are old enough get the kids together and make a project out of it. A reel can be made in 30 minutes or less.