We have designed a series of interactive installations and exhibits created for the mathematical exhibition curated by Claudio Bartocci and Luigi Civalleri at the Palazzo delle Esposito in Rome. The interventions aim to represent mathematical demonstrations, basic numerical concepts, emotional suggestions, educational content, all aimed primarily at a young and participatory audience. Among the projects, the following stand out: The tunnel of numbers, an interactive environment consisting of two long projections, welcomes visitors who, as they pass, animate a landscape of numbers. Anthropometry is an installation that detects and visualizes the height and weight of visitors and dynamically generates infographics aggregating the data collected during the exhibition. The musical scale table is an exhibit that allows you to experiment with different musical temperaments by interacting with an instrument that is half sequencer and half psalter. Buffon's Needles is a multimedia installation that allows you to dynamically and virtually experiment with the homonymous method for obtaining Greek IP. The numbers of the world is a suggestive installation that is divided into a series of columns equipped with large displays that display in real time data relating to various human activities in Italy and around the world.