That is my question of the day.  I looked online to answer this question, and couldn’t find the exact answer, other than it was made in Sweden and packaged in China.  I’m thinking the person who invented moon sand was first off, a guy, and second, did not have kids.  Because if they did have kids they would never think of developing such a toy!  And if they still did, their wife would probably leave them!  This is a set my son got for Christmas from a relative.  It is supposed to be good because you can keep all your moon sand, and play with it in the case.  There are a few problems to this, if you don’t keep the plastic bags, (which are not resealable) all your sand gets mixed together.  Plus moon sand NEVER stays in the tray.  It gets everywhere!  It’s messy, and I hate it!  My boys on the other hand love it!  They also choose to play with it right after I’ve finished vacuuming.  WTH!  Here is a picture of them playing with it.  As you can see, there is moon sand on the table around the container.  Here are the reasons why I hate moon sand, and if you haven’t already bought your kids some…..DON’T!
1.  Moon Sand goes everywhere!  And if you have tile or wood floors they will become extremely slippery!
2.  It attaches to everything.  The dog, your socks, your cat, your shoes! 
3. Sand is meant to be played with outside, not inside.
4. It states that it is Non-Toxic, but it should not be eaten or swallowed.  I don’t know why you would eat it, but there are paste eaters out there.
5. In the instructions in big letters it says “DO NOT allow soap or liquid soap to come into contact with the moon sand.”  This makes me want to do it, just to see what would happen.
6. It also says “Wash hands after use“, ummm, doesn’t that contradict the whole #5 of no soap coming in contact? 
7. 10 minutes of play, 10 years of finding blue, green, and yellow sand everywhere.
8. There’s 10% less sand to play with after each use (this is both a good thing and a bad thing)!  It’s where the 10% went that is the bad thing!
9. Sand fights (remember I have 2 boys ages 8 + 10)
10. Someone always rubs their eyes when they are playing with it.  Emergency eye wash anyone??