I adore my many friends, but as the mother of a highly energetic 4 year old, my best friend is the multi level, multi function play systems.  My son can bounce, slide, jump, climb, kick and punch to his heart’s delight.  Even in France he can play on these things for hours.  He always makes new friends.  It does not matter what language they speak, whether French, Spanish or Arabic, the language of playtime is universal.