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.