This instructable explains the 'basics' of making yourself a home-made crossbow. Feel free to experiment and comment!
Step 1: Materials
Step 2: Cut the wood
Step 3: Make the bow and string
Then onto the Bow. You need your popsicle sticks, wood glue and tape. Take your first popsicle stick and glue them together overlapping. Then let everything dry. Then you need to just start adding on popsicle sticks with tape at the weekest points and where it may bend more to stiffen it.
Step 4: Make your cocking and aiming devices
For the aiming device you have the clothespin and rubber bands. Put the clothespin on the back of the piece if wood. Then simply put all your rubber bands around the head or jaws to increase pressure on the jaws.
Step 5: The arrow and firing!
Then if you really want to get a long rubber band and put the rubber bands to ends around the bow that's on the wood already. Then have the two center points on the rubber band on the back so it holds the bow in place a little. I never use that because it's just easier to hold with my fingers.
When you are ready to fire,string your bow with the peice of string, then place the bow on the front so it is in the corner of the cut you made. Then pull the string back so it is held by the clothespin. Then place your arrow in front of the clothespin and point and shoot.