Float fishing is very popular and fun for younger anglers since they get to see the float on the surface. Tying a float to a fishing line is easy and doesn't require any extra tools besides what is likely already in your tackle box.
Get out your fishing rod and reel set-up. Pull out 2 feet of line beyond the last eye on the rod. You will need to make a stop knot, so cut a 5-inch piece of nylon about the same width or diameter as your line.
Take the nylon and place the centre over the line (about 6 inches from the rod tip). Take both ends of the nylon and swoop them under the line then back over. Bring the two ends together over the top of the line and form a surgeon's knot by twisting the nylon around one another into a coil (see image). Then tighten the ends and pull closed. Tie one knot on top and cut off the ends.
Add a single bead to the line. It will go wherever it wants to go as it is free-moving or loose-lined. Don't worry; this is what it is supposed to be. Thread the float onto the line. It will likely press up against the bead and rest beside it.
Thread a weight of your choosing on the line. It will press against the float. Add another bead to the line. This one will attach to the side of the weight but remain loose when you move the line.
Take some extra line or line from another spool and cut off a piece 15 inches long. On one end, tie a swivel on with a simple knot (unless you have a preference). On the other end, tie on your hook.
Take this extra piece of line and tie the free end of line from your rod to the empty side of the swivel. You should now have a float tied on and an attached line with hook. You're ready to fish!
Practice your knot-tying skills a few times on a spare piece of line so you don't ruin your good fishing line.