All you need is a white plastic ball (baseball sized), blue duct tape and carcboard.
Step 2: Wings
Here is a basic shape for each wing (see picture). Simply cut it out of carboard. I racommend using white cardboard, which I had no access to. Then draw a wing pattern on them.
Step 3: Assembly
Take your wings and fold a bit of the base until it is at a 90 degree angle to the rest of the wing. Then tape them the folded bit onto the ball using the blue duct tape. Nw you have a vey simple Navi of your own.