Cut out two circles of card, one black and one white. On each of them, cut a radius, so you have a slot running half way across. On the white one, measure 23 and a half degrees from the slot, and draw a diameter from this point. Repeat this on the other side of the slot. Then measure 180 degrees less the angle of your latitude on both sides of the slot and draw an arc between the two points. Now interlink the two circles, so that the black circle covers the white half way round. This represents the equinox position. The arc which represents your latitude will be divided in half, and sunrise and sunset would be at six (morning and evening). If you move the black circle around to the 23 and a half degree line, you will be showing the winter solstice position. If you move it back, you will be showing the summer solstice position. Other dates lie in between, and I haven't worked the maths out yet. If you live above the arctic circle, the black will wholly cover your latitude line. This only works for one hemisphere at a time. The opposite one will look equinoctial all year round.

Penny