An important issue in mathematics education in many countries has long been how to make use of students' daily life mathematics (informal mathematics) in teaching mathematics at school (formal mathematics). This communication proposes an alternative framework of mathematics education that bridges informal and formal mathematics using ethnomathematics. Ethnomathematics can be defined as mathematical techniques or styles in explaining, learning, knowing and coping with natural, social, cultural and even imaginary environments (D'Ambrosio, 2006). In this article, the author shows how ethnomathematics can act as a bridge between formal and informal mathematics in an Indonesian context, using a dialogue between three personifications of ethnomathematics, formal mathematics and informal mathematics: (1) Ethios (a personification of Ethnomathematics); (2) Meukhop (a personification of Informal Mathematics); and (3) Geom (a personification of Formal Mathematics).