I made a little research and almost all used alka-seltzer and could be only used one time, beiing necessary to put more alka-seltzer to make it run again.
all you need is:
a small alluminium can,
a piece of net,
a pice of MDF,
a glass bottle (colorless is the best)
alcohol,
a felter pen (to paint alcohol)
mineral oil (is the best becouse you can paint it, but you can use olive oil, cooking oil, or similar, but you won't be able to paint it)
a crayon (to paint oil)
water
a lamp (halogen is best, but you can use any other, but it has to heat a lot)
a ceramic lamp socket (IS VERY IMPORT THAT THE LAMP SOCKET IS CERAMIC, OTHERWISE IT WILL MELT!!!!!!!!!!!!!!)
a switch
wire
a plug
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Signing UpStep 1: Preparing the bottle
preparing the alcohol
to paint the alcohol, disassemble the pen (mine was green to put the alcohol green), remove the charge and squeze the ink onto the alcohol. if necessary shake it.
PART 2
preparing the lava
to paint the lava (oil) use a crayon and dissolve it onto the oil. this is a very difficult thing, becouse you have to wet your fingers in the oil, rub them in the crayon and clean the oil in your fingers in the remaining oil.
PART3
filling the bottle
put the oil in the bottle and almost fill the bottle using the alcohol, on the remaining space go adding water until the oil almost start going up. THIS IS A VERY HARD TASK, BUT IF NOT WELL DONE THE LAMP WON'T WORK! the alcohol wil get turbid, but after some time it wiil get the original colour. if the oil goes up, put some alcohol.
PART4
put the cap on the bottle

































![Home-made lava lamp [updated for the last time]](http://www.instructables.com/static/defaultIMG/default.SQUARE.png)






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http://www.instructables.com/id/DIY-lava-lamp/
As for the spelling/grammar/English -- I know many, many people -- of older generations that can't spell or write worth beans!
Again - as for the submission - WELL done! That's what it was for -- I'm sure you wanted us to learn how to create our own Lava Lamps -- not to discuss how well or not well you spell, right?
I only speak/read English and did not have any problem following this project. Better an interesting project with poorish english than none at all. I wonder if you can write as well as tgferreira in his language and at his age? (By the way 'apalled' is spelt 'appalled')
Ferreira is a common surname in Brazil or Portugal. Being a school project, his age is, at maximum, 16yo.
My native language is Portuguese and I made some mistakes in English, sometimes. I don´t know all the grammatical rules but I decided to learn English till I can get or pass a required information.
I´d like to suggest the people who are annoyed about this poor English, to waste some time "fixing" the text and send it back to the author in order he/she can publish it again.
Another option, everybody should write an Instructable in his current language. It would be a collection of photos for most of people who speaks only English.
Instead of that slow, and difficult way... Try adding 1 part beeswax, 3 part crayon, and 3-5 part oil. Place them all in a heat proof bowl, and set in a pan. Fill pan with water about halfway up the side of the bowl(and keep the water topped off as you go). Now just apply heat, till everything begins melting together, and stir well.
Let it cool, and check for consistency. Should be something like marshmallow.
If it's too hard, add more oil, reheat, and remix.
Either pour into your lavalamp while still warm, or wait till it cools, and cut into pieces that will fit through the neck.
The ratio of the different types of oil and wax will GREATLY effect the action of the lava. Trial and error are the only way to get it "just right".
It will probably never be as smooth as the brand name lava. then again, there's no Carbon tetrachloride to toxify your liver either ;-)