I wrote some weird thing for english class. I'm thinking of adapting it to be an ad in a futuristic magazine. I hope that, at the very least, it's interesting. Moon Bauble If cheap interstellar travel is invented, moons will be very interesting toys. Take a small moon, with no atmosphere, and inactive tectonic plates. Spin it slowly, just enough to cause a day to last a week. Find a large asteroid made primarily of ice, and gently put it on the moon. Then melt it. It should be large enough to flood the entire moon, so it would be about fifty feet deep. Then wait a few weeks for the water to calm down. Then set up cameras around the moon in a high, slow orbit. Here's the fun part. Drop meteors of small to medium sizes on the moon. Imagine a lake that had no ends. The ripples would literally encompass the entire moon. Eventually friction would cause the water to settle down again. There would be some distortion of the water due to the spin of the moon, so it would be better to heat the water manually. Then it would be possible to move the moon far away from the sun, without the risk of water freezing, and it would not have to spin. Be sure not to heat the water up too much, or it could develop an atmosphere. They you would have annoying clouds between the cameras and the water's surface. Customize it. Paint the surface of the moon before you dump the water. You could provide a red backdrop to make a blood moon, or hire someone to make the largest painting in the solar system. Lights could be set up for timed shows. Have floating devices with large mallets that can be activated on remote control. This would allow controlled ripples at any time, without having to go out and find more meteors. Try other liquids. Mercury would cause weird silver ripples, if you can find enough of it to cover an entire moon. Oil would ignite if a meteor hit, so the entire moon would catch fire. Of course, it would only work once, and an atmosphere might develop. The moon might also become unstable. Try spinning it extremely fast. Determine its tensile strength, and spin it at a little below that. Then put water and other liquids of slightly different densities on it. They will eventually separate, and form odd patterns. Or spin it faster than its tensile strength allows. At first it will slowly become an oval, and eventually it will tear itself apart, and fling parts all over the solar system. And of course, there are the classics. Cover the entire surface with mercury, a ton of it. Then move it far away from the sun, so that it gets extremely cold, and do not heat it. If it isn't disturbed, a perfect silver sphere should develop. Then start the largest domino set even seen. Time it. Depending on the size of the moon and how it is set up, it could take days or years to finish. Or, with the solid smooth mercury sphere, get a single surfboard. Make the surfboard incredibly tough, probably out of a material tougher than steel, and then move it at incredibly high speeds a foot above the planet. If it is moving fast enough, it can be put into a low orbit, merely one foot above the moon. It should circle indefinitely, without any atmosphere. Put someone into a space suit, and speed them up to the speed the surfboard, and they could safely ride it. They would not even need something to hold them to the board. Of course, there is much more than can be done with a moon, or any large body of mass. This does not even get into creating life.