What is the giant coin slot before the boss area in the Sand Kingdom?

WHIZZO 3D Printer Part V-Slot Gantry Plate 20Mm Black Sand sand slot Fiber Sand Disc Angle Grinder 125mm 10Pieces 120# Grit Sandpaper Grinding Tablets Fibre Discs Cross Slot Fitting Steel P more Hot Deal ends in 57% off sandholt slot The output slot becomes full: Either the slot has a full stack of the output Sand , Used to make transparent structures Also used to craft glass

sandi slot SAND,#80 WELL SLOT 100 LB POLY