A series of caches along the Broughton Brook.
This stretch of the brook is along the route of the, proposed, new Milton Keynes to Bedford canal. Stretching from the Grand Union canal in Milton Keynes, the canal will run across Willen Lake and meet up with Broughton Brook in Atterbury. It will run along to Jn 13 of the M1, where an existing cattle creep will take the canal under the motorway. The plan calls for the building a series of locks to negotiate Brogborough Hill. The route will eventually meet up with the river Great Ouse near Kempston. Once completed, you will be able to navigate from the North Sea to the Severn!
Good luck to them, I say
On to the cache. You are looking for a small container, camouflaged to blend in. It's only large enough for small swaps. As always when caching with little ones and pets, take care, there is open water nearby.
There is a path running alongside the brook, which you have to leave to find the cache, so I'm giving this a terrain of 1! It should be OK for buggies and wheelchairs.