Can toys disapear majicaly?

So i was getting ready to play my game I had made up when I went to get to charactors. Thats when I noticed it whent mising. I was starting to get really woried because I was going to use it for a school project on "What Is Your Favorit Hoby?" So I looked on the floor where I knew where it whould have gone but it wasn't there. So I asked my sisters if they knew oder saw where it was. They sagte no. Please help! The project is dew in 6 days fom 9-3-12. HELP!