You can use wire Flag Stakes to outline an obstacle course.
Step 1: Supplies
1. Flag Stakes
You can get Flag Stakes at your local hardware store. HomeDepot sells them in bulk. A package of 100 costs about $8 bucks.
2. Long-Nose Pliers to bend the wire Flag Stakes.
Step 2: Determine Height
The first bend in the wire determines the height of the flag.
For a small height flag, which holds up good in the wind, I used the length of my longest finger.
For a tall flag, I used the length between my thumb and first finger.
Step 3: Make the Base
Make the base by bending the remaining wire into a triangle or square.
You should experiment with different base styles. I prefer the triangle base, with flag positioned in the middle.
Step 4: Setup Obstacle Course
Use your new flag cones to create a cool obstacle course or outline a playing field.
We created an obstacle course for our bikes and another one for our remote controlled truck.