This Christmas break, I have been mucking around with science experiments for my kids. Here is the first of a few easy experiments you can try at home.The following videos show you how to make a home-made lava lamp. It is very simple - grab a clear cup (or bottle or vase or flask), fill it about a third full of water and two thirds full of oil. The oil floats on the water as it has a lower density. Add some food colouring (you can do this at the start directly to the water, or after you have add...
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