is it more of a commercial thing for people in the business with an air show thrown in at the end?
Oh absolutely
Are there planes to get inside and stuff like that?
Yes, but not very many and on public days the queues can be long.
I really think 5 is far too young to fully appreciate the Farnborough Airshow. On public days there is a Funfair at one end but that's got nothing to do with aircraft. One can go (almost) anywhere and pay for rides and they are not cheap.
Points: it is a large site (with a bit of a hill). The free bus travel to and from the free car park is well organised but not especially quick. On public days (particularly when the weather is fine) the crowds are huge and on rainy days the mud is annoying. By the time one has reached the displays at the far end one is going to be shattered and then you have to walk back, after hoovering up all the freebies from the displays/stands one needs a strong bag, strong arms and strong bladder control. Toilets are few, the noise is not loud it?s very loud and next to the runway it?s painful.
My advice is don?t take anyone under 12. Arrive early, take food and drinks with you in disposable containers, it is expensive to buy. Get a free layout guide and make a point of going straight to the Halls first (there are 4 halls). Try the Flight Simulators before the queues get too big. Do the hoovering of the freebies first before they all go, then eat, then enjoy the Air Display in the afternoon. The best place to view is from the hill where the chalets are, not next to the runway.
The public days are Sat 14th & Sun 15th of July.
If you do go I really hope you enjoy it. I?ve been working on-site since Friday and I find it all absolutely fascinating. You might see me!