For your children-Homemade Lava Lamp

You need - Potrebno vam je:

    plastic bottles   - plasticna boca
    vegetable oil     - biljno ulje
    water                 - voda
    food coloring     - prehrambena boja
    Alka-Seltzer

Fill bottle a little more than half with oil - napunite bocu uljem malo vise od polovine:

Then fill the rest of the way with water. Leave about an inch at the top - Zatim dopunite ostatak vodom ostavljajuci oko 2.5 cm od vrha:

Now add 10 drops of food coloring - Dodajte 10 kapi boje:

Break your Alka Seltzer into 4 pieces and drop them in one piece at a time.  Wait until the first piece stops bubbling before you drop in the next.  If too many go in, you solution gets all cloudy. 
- Polomite Alka Seltzer na 4 dela i stavljajte jedno po jedno parce u bocu. Sacekajte da se mehurici stisaju pa stavite sledece parce. Ako se stavi previse Alka Seltzer tablete moze se napraviti previse mehurica pa ce sve izgledati kao magla, bez malih mehurica:

and watch the magic happen... - i gledajte sta se desava ... :

over...and over...and over again.