No, seriously, you'll need chemical know-how and a safe lab environment, so don't try anything at home.
2.
Dump liquid nitrogen into a pool.
3.
Freeze lightning into what's known as a Lichtenberg Figure.
4.
Smash a flower that's been frozen with liquid nitrogen.
6.
Summon a warlock with a trimethyl borate wildfire.
7.
Trap your hand in hot ice, or sodium acetate trihydrate.
8.
Light some salts of chloride and methanol.
9.
Make purple smoke with iodine and a light sprinkle of magnesium powder.
13.
Drop rubidium into water that contains an indicator.
15.
Make a cube float using a conductive surface that's been cooled with liquid nitrogen.
17.
Watch the world burn.