Abstract
Algorithmic thinking is at the hearth of the best known computational thinking. It requires the abilities to decompose and model a problem with a certain representation, and devise or understand an algorithm for making a computer solve it. Such abilities are rather abstract and thus algorithmic thinking is often neglected in primary and middle schools. This research picks up the challenge of designing interactive tangible objects, enhanced by Internet of Things technologies, that can help children in mastering algorithmic thinking. The research reported in this paper focusses on graph algorithmic thinking, the latest prototype of tangibles for graph algorithmic thinking and its usage in the field.