Dilute magnetic semiconductors such as Cd(1-x)Mn(x)Te are of importance because of the strong enhancement of the magnetic properties of the electrons and holes that occur because of the spin exchange interaction with the magnetic ions. The exchange interactions lead to novel features such as magnetic tunability of the bandgap energy and the formation of magnetic polarons. Such materials can now be incorporated into multiple quantum well structures. Aspects of the resulting behaviour are discussed, together with details of the MBE growth of the layers on InSb substrates.