Try this
Small things to try.
Each one takes about a minute, needs nothing but your hands, and ends with a result you can argue with.
No. 1 · Time
How long is ten seconds?
Hold the button, count in your head, let go at ten.
No. 2 · Networks
Cut a cable.
Snip the wires between you and the site. How many can go before the message is lost?
No. 3 · Hands
Draw a perfect circle.
One stroke, no lifting. The card will judge you.
No. 4 · Eyes
Colour memory.
Look at a colour for three seconds. Then find it again among its cousins.
No. 5 · Numbers
Fold paper to the Moon.
A sheet of paper, folded in half again and again. It reaches the Moon sooner than you think.
No. 6 · Odds
Three doors.
A car behind one, goats behind two. Pick, watch the host open a door, then decide: stay or switch?
No. 7 · Sky
Daylight in Tallinn.
Slide through the year and watch the sun's arc swell and shrink over the city.
No. 8 · Levers
Push the door.
Move the handle along the door, then push. Near the hinge it barely moves.