You can do so by dragging (a stack of) Super TNT into your quickbar (as with all explosives) and then put one of them on the ground with right-click. Then right-click directly on the bomb again to activate it - and quickly back away. This bomb makes more damage on the surrounding and can destroy harder blocks than the Advanced TNT. In earlier versions of Creativerse the Super TNT was called "TNT Tier 3". To craft 4 bombs of Super TNT at once, you'll need (as of R28 in January 2016):