The My Mini Golf set would have served us well this last week, with pouring rain and about 5degC outside, our nearly four year old son was really over all his games and us.  With our wooden floors and stairs this game could have taken up quite a large chunk of the day.  The play anywhere golf game for indoors and out, it can be purchased from their website (they only ship within Europe), or it can be purchased in the USA from Ameico.  

[Via minor details]