This is one of the easiest projects you could do. It takes no skill. Of course you can make fancier eggs as your cake decorating abilities progress, but it is not necessary at all. The amount of sugar mixture needed will vary with the size of the mold, of course. Pack this mixture into the mold and immediately invert onto a square piece of cardboard not too much larger than your mold.
Place molds on a tray.
You must experiment a little. All ovens are not the same, so yours may require a minute or two more or less than my oven. Hold the baked sugar piece in your hand and carefully, use a spoon to scoop out all the loose sugar. Dry pieces overnight. Before baking or drying, cut out the window using dental floss or a very thin- bladed knife.