Lashings of Ginger Beer

Subtitled: This is a spiffing role-playing game from Simon Washbourne.

From the publisher's website:

The full version contains all the rules you will need to create player character kids, that will take part in adventures in Idyllic England. Included are 6 adventures, a character sheet and even a recipe to make your own Ginger Beer. All in a pocket-sized 28 page booklet.

Although inspired by Enid Blyton's Famous Five, the game can be readily used for Nancy Drew or similar American equivalents.

Mixing the game with the setting of one of your favourite fantasy rpgs you can create adventures in the mould of Alan Garners Weirdstone of Brisingamen or the Narnia stories of C S Lewis.