Cardboard is a toy in OMORI. It cannot be used in battle, but can be used in the recycling machine in the Otherworld Campsite for some useful rewards, as well as 15 clams for every Cardboard recycled.
Give to recycle machine for 15 clams.
Cardboard can be acquired in different ways:
- As a possible find for breaking barrels in the Deep Well.
- When opening watermelons scattered all over Headspace: