| Floating eggs | | | | other. |
| We all know that a fresh egg sinks in fresh water. Find | | | | Rockets |
| out how much salt you need to add to the water to | | | | You'll need a 2 liter soft drink bottle and a pump (a foot |
| make the egg float instead. | | | | pump is easiest but a bicycle pump will work as well). |
| Volcanoes | | | | Almost fill the bottle with water. Pump in air until you |
| This is messier! OK, you can make a simple volcano | | | | get a launch. See how high or far you can send your |
| using vinegar and baking powder and you've probably | | | | rocket. |
| got the ingredients already. For a more realistic | | | | Growing Crystals |
| volcano, complete with gray ash, get hold of some | | | | Boil 2 liters of water. Pour it into a jug, keep stirring and |
| ammonium dichromate, which burns fiercely and gives | | | | keep adding either salt or sugar until the water won't |
| out sparks as well. | | | | hold any more (you'll see some salt or sugar at the |
| Make Slime | | | | bottom of the jug that just refuses to dissolve). Decant |
| Take 7 tablespoons of milk and 1 tablespoon of | | | | this solution into a new jug. Pierce a hole in a sheet of |
| vinegar. Let solids form and then filter them using | | | | card. Dangle a paperclip on a piece of string tied |
| kitchen towel or a coffee filter. Squeeze out the last of | | | | through the hole - the paper clip should be about 5cm |
| the liquid then use about 1/4 teaspoon of baking soda | | | | from the bottom of the jar. See what crystals form on |
| to bind the solids together. Enjoy your slime! | | | | your string. |
| Levitation | | | | Make Lightning |
| At its simplest, just use two magnets. Use them to | | | | This needs to be done in a dark room. Inflate some |
| push each other apart. If you've got access to round | | | | balloons. Rub them rapidly against a woolen sweater |
| magnets that look a bit like hoopla hoops, place them | | | | (do this at least 10 times). Hold the balloon near a metal |
| on a round pole and see how well they repel each | | | | object like a door handle and watch the sparks fly. |