Freak out your friends and relatives with this environmentally-friendly fuel cell spider!Now this is a great way to freak out your friends and relatives!\r\nThis is a concept of an environmentally-friendly fuel cell spider. The kit teaches children about new forms of clean energy.\r\nUsesalt wateras a fuel to make the spider move. First build the spider, then be amazed that by adding just a few drops of salt water the spider will come alive and move along in a frightening manner.\r\nAll materials used in this kit are environmentally safe and clean, no toxic substances or disposal concerns.\r\nRecommended for ages: 8 – 12 years