Why are soap bubbles round? In a web of bubbles, why do soap films always meet in groups of 3? Find out the answers in this hands-on activity and create your own bubbles with our special 'soap bubble wands'! You'll also learn the mathematics and physics by which nature arranges soap bubbles. You can even play with a 'soap bubble computer', which is able to solve a real-world problem: how to build a railway network between different stations in the most efficient way?