We gave our son Kevin a Weird Science Birthday Party for his 7th birthday.  First off we hired a company called Weird Science (www.weirdscience.org) to come to Kevin's birthday party. The Weird Scientist came to our home and set up his mini lab and performed spectacular educational science demonstrations.  The Science show lasted for about an hour.  A few of the kids were chosen to assist the Weird Scientist in some of the demonstrations.  All the kids got to do a hands-on experiment (they made slime) that they were allowed to take home. At the end each child was given a take home experiment and Kevin was given a cool Weird Science Kit which contained a few science experiments. We decorated the house with laboratory themed party decorations: plastic beakers for cups, a large bubbling potion pot with dry ice and electric green punch from Kool Aide, lab safety posters on the walls (free from Flinn Scientific) we had a plasma globe as our center piece and on either side were plastic flasks with "pixie stix" candy as stiring rods, a napkin and a fork stuffed in plastic test tubes for each setting, octagon shaped paper plates, black plastic tablecloth to emulate the black veneer on lab counters.  The table itself we raised on blocks and around it we put our bar stools instead of regular chairs to create a more lab like environment.  Each child was given A Weird Scientist Chem Lab ID badge with their name on it, a child's lab coat and fake plastic glasses which I purchased both from a local costume shop.  I also found a real one for myself at thrift store and a pair of safety goggles.  We purchased invitations from Weird Science that were printed in full color and sealed in mailable test tubes. Inside the invitiation said "Kevin has concocted a Spectacular Weird Science Party for you in his Science Lab." then it was followed by the particulars.  I made a cake that was shaped and iced like a volcanoe.  In the top of the volcanoe I cut out a hole in which I placed a plastic cup. Inside the cup I poured lemon juice and red food coloring.  Once Kevin blew out his sparkler type candles I poured baking soda into the top of the volcanoe and it spewed over the top and made a really cool flowing lava effect. My husband, who is a welder, purchased Liquid Nitrogen from a local welding supply store and made Ice Cream for the kids as an experiment in freezing point temperatures of different liquids.  He took a large metal bowl and into it poured milk, a little cream, sugar and strawberry jam, and mixed it.  Then he poured in the liquid nitrogen and stirred until the nitrogen was boiled off or dissolved.  After which was then edible ice cream. It made a spectacular amount of fog, like a fog machine. A really cool effect. (I reccomend that you learn the safety precautions of handling liquid nitrogen before attempting this experiment). I also made party bags which contained: mini containers of slime, mini silly putty eggs, mini puzzles, pop rocks, a superball making kit, a light prism, dissapearing ink, and a foam airplane kit (these were found at our local party supply store). We played pin the element on the Periodic Table. The child who pinned their element closest to its place on the Periodic Table won the prize. We also had a molecular bonding race with mini marshmallows and toothpicks. The kids broke up into teams of three, they were given a half bag of mini colored marshmallows, and a box of colored toothpicks.  The group who built the largest molecule (that did not fall apart) won the grand "Nobel" prize and second and third place won prizes respectively. All the kids, including me, had a great time. A few of the mother's that stayed at the party were just amazed at how much the kids enjoyed themselves and some even said that they too had learned something new from the Weird Scientist.