This document discusses building personal learning environments (PLEs) on microblogging platforms. It provides an overview of PLEs and microblogging, and uses Cirip.eu as a case study example. Cirip.eu is a microblogging platform designed for education that allows users to embed multimedia, participate in groups, and access open educational resources from their mobile devices. The document explores how PLEs can support formal and informal learning when constructed on microblogging platforms.