Kutsuwa Japanese Parfait Eraser Making Kit DIY set to make your erasers, with molds, *Adults should supervise children under 8 years of age*, NOTE: Need to use MICROWAVE to make the erasers. by Kutsuwa, import from Japan, the clay is very soft and is called "Fuwa Fuwa mousse" in Japan content: clay mousse, mold set, box for cooling the mold size of the box:, width: 10cm (4"), height: 8.2cm (3.2"), depth: 10cm (4") incl. instructions with pictures, 1) press clay into mold, 2) put the modelled clay into the box & add water, 3) put the box into the microwave for about 2-5 minutes, 4) remove hot water and add cold water to harden the eraser