Another first rate horse and children story, with an additional touch of here and now in the inclusion of two English children, here ""for the duration"", and of their problems of adjustment to American life, and to a strict grandmother. The story revolves around holiday activities, particularly the planning of a ""jungle"", modelled on the jungles of which the children had read. Here is a cooperative vacation project, worked into a perfectly ordinary round of summer activities, in families without unlimited finances. One boy is absorbed in collecting specimens along the river banks; his small sister's dream of happiness is to have a pony to ride whenever she wants, the youngest member of the family is a lovable mischief, always finding out what is going on everywhere. Good family story, with enough incident to carry the story along.