Qubits (short for quantum bits) are often made of the same semiconducting materials as our everyday electronics. But now an interdisciplinary team of chemists and physicists has developed a new method to create tailor-made qubits: by chemically synthesizing molecules that encode quantum information into their magnetic, or ‘spin,’ states. This new bottom-up approach could ultimately lead to quantum systems that have extraordinary flexibility and control, helping pave the way for next-generation quantum technology.