This poster submission introduces "Tokens in Mind", an Unplugged board game designed to teach K-12 students about the ecological and economic aspects of Non-Fungible Tokens including the basic ideas of Blockchain Technology. Although Blockchain technology has been a major breakthrough of this millennium and is being researched extensively at its core, there have been few serious attempts to transfer the concepts for educational purposes. The same applies to the research on the integration of Non-Fungible Tokens at school level. To work on this literature and potential research gap, we invented the board game "Tokens in Mind". In the board game the players need to buy and trade Non-Fungible Tokens, interact with physical "Ether-Coins" and also have to care about an environmental currency called "Eco-Coin" to fulfill several predefined goals. The board game does not require any technical aids like computers, making it accessible to a wider range of students.