In 2 experiments, characteristics of reference objects for spatial reconstruction in children were examined. In experiment I, 57 4-year-old children were asked to reconstruct model layout after rotation which contained 3 dolls and a house of paper. In two cue conditions, one of the objects (a doll or a house) was preset on a response paper as a reference point after rotation. A long house in the middle of the layout was proved more effective as a reference object than a doll near the edge. In experiment II, 80 5-year-olds were made to reconstruct another model layout. A sq uare house near the edge was seen more effective as a reference object than a bird with a long trunk in the middle. The results were discussed from the view of children's fixed frame of reference, especially ‘topos’ of a house and affordance.