How to build a quantum computer and what to do with it

Quantum computing is an exciting area of research because of the prospect of solving problems that are believed to be intractable on any classical (i.e. non-quantum) computer. Unfortunately a quantum computer is hard to build. Also, when we do make a quantum computer, it will be small so what interesting things can we do with it? I will use animated films to show how quantum computers are being built and explain the problems with these schemes. Then I will explain how a small-scale quantum computer could be used to simulate the properties of quantum systems.