Chestnuts Riding School,
All, apart from the very young.
Varies: check website for details
All things horsey!
Details on how to get there are available on their website.
The Chestnuts Riding School is an Equestrian Centre located 5 minutes outside of Brighton on the A23 Southbound. They have a huge floodlit Indoor Arena for year round riding, and the best hacking in the area, with instant access to the South Downs via their Private Bridlepath. You can ride past sights like The Chattri/Indian Memorial, Pyecombe Golf Course, even Ditchling Beacon and The Windmills on longer hacks.