There should be Olympics of other difficult tasks. National teams, plus individual stateless people.

All events take place in the exact center of a perfectly circular white room, or else on an infinite, perfectly flat plane with no weather. Or else on a standardized flat plane without landmarks. For point positioning events, participant can position all the markers.

Distance

Draw two dots exactly one foot apart. Score is how close they came to exactly correct. Divisions: 1 foot, 1 meter, 10 feet.

Length

Draw a straight line exactly 1 meter long. Time limits: 3 seconds, 1 minute, 10 minutes.

Walking

Drop a marker, then walk to place another marker exactly one mile away. Time limits: 5 minutes, 8 minutes, 25 minutes. Variants: Challenging terrain.

Area

Trample exactly 1 square meter of grass.

Shapes

Place three dots in a perfect equilateral triangle, with side length 100m.

Draw a perfect circle

In chalk. Scoring is done with a camera which inscribes the largest possible circle in what is drawn. Testing would be needed to determine the best scoring algorithm. After a circle is drawn, another circle would be inscribed

• in (largest)
• outside (smallest)

of the drawn circle, and then we would look at either:

• The area of the area between the drawn circle and the perfect circle.
• The maximum distance (along the line of a radius of the inner circle) between the inscribed circle and the drawn circle.

Guess the weight of things:

You are allowed to touch & pick them up.

• A metal block
• A giant rock (of a known material, all above-ground). divisions: 1-10kg, 10-100kg, 100-1000kg

Choose the heavier of two objects

Whose weight might be very similar indeed.