 Recent advancements in multi-material 3D and 4D printing have opened up a world of possibilities for creating complex objects with multiple functions. These technologies allow for the simultaneous production of multiple components from different materials, allowing for greater flexibility and cost savings. Additionally, the ability to print in three dimensions and time provides a wide range of applications, such as medical implants, automotive parts, and even clothing. This paper reviews the various features and applications of 3D and 4D printing technologies, and proposes new avenues for the development of multi-material 3D and 4D printed objects. This article was authored by Muhammad Rafi, Rahala de Farani and Daniel Tiroit.