Citigami is a souvenir card powered by daylight, without batteries or batteries; a poetic, playful, educational and decorative object, to give away, assemble, and then switch on. Magical! Place it near a light source and it will flash instantly. In the spirit of sustainable development dear to the Litogami brand, it is made from ecological cardboard by people with disabilities. To capture light energy, it uses, in PREVIEW, a brand new photovoltaic process with very low carbon emission, called Asca©, developed and manufactured in France.