Liquids held still pour like water from an opening the brush's width, pushed by this pressure. Sand and other powders pour at their own rate.
Turn on ambient heat to use the air temperature.
A falling-sand physics sandbox. Sand sinks, water pools, lava ignites wood and gunpowder goes off with a bang.
pt is the tool API){b|Start} makes a button that sparks the wire under it; {t} {p} {type} show what is there, live