Martelo desenvolvido para o concurso "Martelinhos de São João 2015". Construído em cartolina e com um sistema de ímans que permite fechá-lo e abri-lo, de modo a que o martelo se transforme num manjerico feito em pop-up. Vencedor do 2º prémio do concurso.
Oporto city has an ex-libris object related to the city saint's party "São João", a toy hammer. This is an object developed for a competition in which was proposed to build a new object, based on the original. It is made with cardboard and with a magnetic system that allows it to be closed and open. When it is open, a "manjerico" (typical plant of this folk celebration), made with a pop-up system, appears. Winner of the second prize of the contest.