This can be used for a wide range of activities. It is very helpful when you examine the bacterial and fungal growth on your plastic dishes (see Section 9), examining insect visitors on flowers, or taking a closer look at earthworms. A key tip is that we do not use these lenses in the way Sherlock Holmes did! That is to say, do not hold the lens at arms’ length but bring the item you are examining to the lens, which is held in front of your eye. Do not do this if the object you are holding is potentially dangerous. Mind you, who in their right mind would hold a living bumble bee!