Saw [[http://www.argos.co.uk/static/Product/partNumber/9258554/c_1/1|category_root|Home+and+furniture|14417894/c_2/3|14417894|Lighting|14418021/c_3/4|cat_14418021|Novelty+lighting|14418032.htm this]] for DS and it says it is touch activated? Am I being really stupid but I thought lava lamps get incredibly hot, so how can it be touch activated?