That's exactly what Lindt have created at their new museum in Zurich, with a 9metre chocolate fountain (unfortunately no fingers or tongues allowed!). The museum gives an interactive history of chocolate and shows you the creation of Lindt bars, as you'd expect, but then also allows you to create your own chocolatey creation, visit the cafe and tasting rooms, aptly named 'Chocolate Heaven' and indulge in the shop on the way out. The place is massive, in fact it's the largest chocolate museum in the world. It took just under 3 years to build and definitely looks worth a visit, although for now a virtual tour will have to do.
See the Lindt website for more info and amazing images