If you've ever sat in a garden on a hot summer day, you'll know how easy it is to lose track of time. The birds are singing, the bees are buzzing - it's so peaceful! But you need never lose track of time again if you make the Finger Tips Sun Dial. Set it up in the garden and as the sun moves across the sky it'll cast a shadow from the stick onto the box, allowing you to tell the time! Isn't it great? To make the Sun Dial, get hold of an empty cereal box. Cover it with a base coat of grey acrylic paint. You'll also need an empty yoghurt pot. Turn it upside down and draw around it in the middle of the cereal box. Once you've drawn the circle, cut it out. Make the cut out shape slightly smaller than the circle that you drew... ...so that the yoghurt pot will fit snugly inside. To create a paint effect that looks like stone, put some black and white paint onto an old plate. You'll also need an old kitchen cloth. Dab a bit of each coloured paint onto the cloth, give it a few dabs on the plate so that the colours mix... ...and start to splodge the mixed paint onto the box with the cloth. It gives a great stone-like effect. Go right round the box so that the whole thing is covered, and then leave it to dry. When it has dried, it'll look something like this. Now you can start veining. To do this, dip a very fine paintbrush into some black paint mixed with water, so that it's quite runny. Run the paintbrush over the box, and remember to go over the sides as well. This creates a very realistic effect. Once all the black lines have dried, do the same thing again with white paint mixed with water. Run the paintbrush all the way over the box, running across the black lines to make it look even more realistic. To add the hours to the Sun Dial, you'll need a ruler and a protractor. Start by drawing a line at the bottom of the box, like this. With a ruler, measure the centre point of the box and carefully pierce a hole through at that point with a sharp pencil. This is where the stick will go. One side of the line will be 7am, and the other will be 7pm. So, take a protractor and place it at the centre point. Measure 15 degree intervals (15, 30, 45, 60 etc) around the protractor and mark them onto the box with a black pen. Take the ruler again and draw out lines from the points that you made, so that you have something that looks like this. The stick is just a piece of garden cane. Dab some stick glue on the end and pop it through the hole. The glue will help to keep it securely in place. Coloured glass beads are great for marking off the hours. Arrange them at the ends of the lines you drew. If you haven't got any glass beads to hand, why not just paint the numbers on? To set the time on your Sun Dial, you need to go outside when the sun is shining strongly enough so that it will cast a shadow on your stick. Pour some water into the yoghurt pot... ...and balance a small piece of tissue paper on the surface of the water. Now magnetise a needle by stroking a magnet across a needle in the same direction. Carefully place the magnetised needle on top of the tissue paper... ...then sink the tissue paper by gently prodding it with a drinking straw. Amazingly, the needle will stay afloat. Because the needle is magnetic, it will always point to magnetic north. So move the box so that the needle matches up with the central line on the box. This means that you'll always know where east and west are, and that you'll know exactly where the sun rises and sets. If there's no shadow cast on your box, just move it around until you have. So, as long as the sun is shining, you'll always be able to tell the time. But don't leave it out in the rain otherwise you'll end up with a super soggy Sun Dial!