In order to solve complex issues, professionals from different fields of expertise increasingly collaborate across domains. These collaborations require meaningful and efficient processes, particularly when design approaches and scientific knowledge is combined.Based on there view of existing literature on the role of incidental learning in ideation and boundary objects in multidisciplinary team creativity, it can be proposed that knowledge sharing can support collective creativity.This approachwas tested in a preliminary study of a collaborative creative task withpairs of design engineers and bio-scientists. Four pairs wereasked to jointly discuss a healthcare-centred innovation brief,and generate novel ideas based on their own expertise. The findings show that boundary objects supportknowledge sharing across disciplinesin creative collaborations-in thiscase, design engineering and synthetic biology.While strong role asymmetry was observed, it has been found that boundary objects are instrumental in ensuring both parties participate effectively in the creative session. In the study, designers were found to be steeringthe conversationsby generating boundary objectsmore frequently than scientists (66% of total number vs. 34%)and sharing knowledge on the design process withthem.This initial study willlater inform the development of a toolkit that aims to support science and design collaboration process.