Provided herein are compounds, pharmaceutical compositions comprising such compounds, and methods of using such compounds to treat or prevent diseases or disorders associated with HDAC activity, particularly diseases or disorders that involve activity of HDACl, HDAC2, and/or HDAC6. Also provided herein are methods for inhibiting migration of a neuroblastoma cell, inducing maturation of a neuroblastoma cell, and altering cell cycle progression of a neuroblastoma cell comprising administering to the cell a therapeutically effective amount of a HDACl, HDAC2, and/or HDAC6 selective inhibitor or a pharmaceutically acceptable salt thereof.