If you build too close to the water, you go swimming. Strand Unter is the three-dimensional family game where everyone places their castles in the sand so that they stay close to the water but away from the tide. Shells and sand abound in the ankle-deep sand channels. If you collect enough of them in competition with your fellow players, you can build a total of four sand castles. These differ in size, value and the building material required. In the end, the greatest castles are those that narrowly avoid the approaching tide. And that can be incredibly close