1. MoonDrop simulates the laws of physics that govern the free fall of Mars and the moon. 2. Whether you're a fidgeter, science lover, you'll love it. 3. Amaze everyone with how technology can do incredibly simple things. 4. When you feel boring,tired or angry,you can take it out and play with it. 5. Later you will find that how time flies,and you will find that you are not so angry at all,and not so tired.
