Math from Three to Seven: The Story of a Mathematical Circle for Preschoolers (Msri Mathematical Circles Library) by Alexander Zvonkin:

Moscow, 16 October 2008: the book is nominated to the short list of a newly established prize PROSVETITEL' ("Enlightener") for the best educational book --

This is a really interesting project to stimulate the math gifted students of 12-13 years old.
More details available from:
Estalmat Madrid ( http://www.uam.es/proyectosinv/estalmat/ )