Recently we went to visit Jordan's Mill. It is the home of Jordan's Cereal and the Ryvita company. Its located near Biggleswade in Bedfordshire, and is well signed from the A1.
We did a self guided tour which cost us £1.65 per adult and children under 16 are free. There was an option for a guided tour which I think was about £5.
First we headed through the shop and restaurant area to the original mill itself. It was really interesting as you could see the water wheel spinning and see all the various cogs, pulleys and machinery turning. On each floor there was information explaining what the various machines do and how the wheat is sifted and sorted. On the top floor was a video showing this process.
Behind the main mill itself is an education centre which had hands on activities for the children. For example, areas where you could try and grind your own flour, information about the Jordan family, models of various types of bread and what the inside of a husk of wheat looks like etc. There was also information about bee keeping.
We headed from there out to the Mill gardens. These gardens are really nicely set out and have planted in them various types of vegetables, grains, fruits and herbs.
From there we crossed a bridge to the meadows which is the summer have a lovely display of wildflowers. There are balance beams and a woodland area to explore and you can see bee hives close up and watch the bees coming in and out of them.
This was a really lovely place to visit and its not massive so I'd say you could comfortably see it all in about 1 and a half hours.