Multistable Structures by Magnetic Dynamic Polymers: A magnetic dynamic polymer consists of hard-magnetic microparticles in a dynamic polymer network with thermally responsive reversible linkages. This polymer integrates functions including magnetic-driven navigating, assembling, welding, morphing, reprogramming, and structural reconfiguration. This art piece shows that a 3D structure with multiple stable configurations can be fabricated from a thin sheet. (Adv. Mater. 2021, 33, 2102113). Contributors: Shuai Wu, Qiji Ze, Ruike Renee Zhao, Xiao Kuang, Liang Yue, H. Jerry Qi