Magma Cube
The Magma Cube, from Minecraft, is the humble cousin of the slime. It possesses the qualities of both "magma" and "cube"
Touching the Magma Cube
Do not do this. If you do this, you will go "Ah ! Ooh hooh hoh hoo! Yeouch! Owie! Ow! Ohh that is Too Hot! Yowza!", or something similar.
This is because magma is very very hot, and you should not touch it, much like Burner Of The Stove When It's Still On, or Fire, as it will burn you.
Eating the Magma Cube
You'd have to blow on it first. This is also true for hot soups.