Here is a very easy to make Knex Fly.
It requires a few special parts but you can replace any that you want with any parts that you have/want to use.
Step 1: Parts List
You will need:
2 Yellow Bendy
1 Green - Sharpened End, Black Rod/Connectors can be used also
6 Black Rod/Connectors
Step 2: Put the Body Together
Connect the Purple connectors Togethor.
Step 3: Attach the Wings
Attach the wings to the body.
Step 4: Attach the Eye Holders
Attach the Green rods to the body for the eyes.
Step 5: Attach the Eyes
Attach the eyes onto the green rods.
Step 6: Attach the Mouth
Attach the mouth to the end of the body.
Step 7: Attach the Legs
Attach the legs to the underside of the body.