BM: Just a follow up question to that. We've heard from a lot of people about interactivity. Is there one exhibit in the hall that strikes you as oh that's a very good interactive exhibit.
HF: Which one would I say is a very good interactive exhibit?
BM: yeah.
(6.5)
HF: It's a really difficult one. (5.3) I don't know. That's really hard because um - there are classics which you think oh - it's really difficult because ideally a really good interactive exhibit is one that makes you want to repeat what you've done. One that gives you a certain amount of - um - influence over the answer, you know. So some people would say that the Bernoulli Blower's a really good example because you can because if you actually physically engage with it you can find out all sorts of things about it. You know you can - you can - you could conduct experiments with a Bernoulli Blower, if you did so desire. However it tends to - it doesn't encourage people to get beyond that - beyond the first "ooh, that's amazing." People go away. That, you know, they tend not to be engaged enough, it doesn't - there's - the way it's built and designed isn't sufficient to get people thinking about it. A Bernoulli Blower that moves, where you can move the jet stream, I would say is much better where - there's much more - much more sort of better hands-on exhibit. I'm trying to think of anything that's actually out there that does that. I can't think of one off the top of my head. I'll have to come back to you. ((laughs))