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In this paper, we present the design and evaluation of Watt-I-See (WISE), a tangible interactive installation aimed at probing awareness in two target audiences (children and adults) about renewable energy resources that could inform eco-feedforward strategies. Our system combines a tangible interface representing five different energy sources, with a set of Lego™ blocks used to manipulate different weather conditions that affect the available energy mix. Through the evaluation of WISE, our main goal was to expose users to the effort necessary to produce the energy used in our day-to-day lives. We evaluated the installation separately for children and adults. The focus on children was due to their importance in the overall household consumption and their role in future scenarios where consumers will have to adapt to the availability of renewable energy sources. The focus on adults was to observe the impact …