This document summarizes 8 citizen science initiatives in Belgium that contribute to open science and cultural heritage. The initiatives engage citizens in activities like crowdsourcing annotations, sharing migration stories, and documenting street art. They aim to move beyond just having citizens collect data by involving them throughout the research process. The initiatives vary in their openness, with some openly sharing datasets, metadata, and results while others are less transparent. Overall they demonstrate how citizen science can enhance open science and cultural heritage but more work is still needed to formalize open data standards and ensure projects follow core open science principles.