Both my children (ages 3 and 5) love this game. Because it is a cooperative game there is no fighting or crying at the end and they get very excited when they beat the winter and harvest their entire garden.
This was my husband and my first exposure to Eurogames. It is a great introduction game because the rules are simple, and yet you need strategy to get the stones while avoiding the river. Because of the changing river I wouldn't say the game is predictable, which is good.