Today I'll tell you how to make a rubber band plane in 123design.
Step 1: Creating the Sketch
You have to first make the simple sketch of your plane, you can refer to my sketch, in the sketch you also have to make a notch for rubber band like in the finished picture as well as the wings.
Step 2: Creating the Handle
For the handle,
you have to first sketch a simple rectangle, extrude it and make a "U" shaped curve in it to hold the rubber band.You can also fillet the edges to make it look good. Refer to the pictures.
Step 3: Congratulations! :)
You made it :)
For Flying it, refer to the picture.
PS I have Included the stl file of both plane and handle. Please vote me for the "Make it Fly Contest"