For this battery, you'll need some copper wire, 15 sheet metal screws, an ice cube tray, and water. In addition, you'll need a pair of scissors, a voltage meter, and two electrical lead wires with alligator clips at both ends. You'll wrap each screw in copper except for one, which you will use as a negative terminal (to which you will attach one of the lead wires once the battery is complete). How many screws you use will depend on how many ice cubes your tray is meant to hold. The tray in this example can hold 14 ice cubes. As long as they aren't copper, you can use any type of metal screw. Zinc-coated (galvanized) or aluminum work well. As for size, aim for screws that are around one inch in length. Wrap a piece of copper wire two times around the top of each screw, just beneath its head. After wrapping the wire around a screw, use your finger to bend the wire into a hook. You'll use this hook to clip the screw to the edge of its ice cube tray compartment. You can either pre-cut the copper wire into pieces long enough to wrap around each screw (with a bit extra for the hooks), or you can work with it long, cutting it as you finish each screw. Each ice cube hole will act as a single cell in your battery. Affix one screw to the edge of each cell. Ensure that there is only one screw in each cell. On one end of the tray, hook a piece of copper wire to the outer edge of one of the cells. On the same end of the tray, place a screw in the cell next to the one in which you just placed the copper wire. Ensure that the screw sits above the rim of the tray, as you will need to attach a lead wire to it. Ensure that the cells are full enough that the copper wire hooks and screws are touching the water. Attach one lead wire to the copper wire terminal using its alligator clip. Then, attach a different lead wire to the screw terminal, again using its alligator clip. Be careful not to let the alligator clips touch the water. It doesn't matter which color attaches to which terminal. Attach the other ends of the lead wires to your voltage meter. The 14-cell battery that you've just made should measure roughly 9 volts. You can boost the voltage of your battery by switching your conductive solution to saltwater, vinegar, bleach, lemon juice, or lime juice, or by using more copper.
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One-sentence summary -- Gather your materials. Wrap copper wire around 14 of the 15 screws. Attach one screw to each ice cube tray compartment. Attach positive and negative terminals to one end of the tray. Fill each cell with water. Attach lead wires to positive and negative terminals. Test the battery. Boost the voltage.

During the teen years, there is a lot going on in terms of hormonal changes and body development. Not only that but most teenagers are trying to learn how to be more like adults at the same time. With all of this going on, it isn't unusual for teens to experience difficult emotions or even depression. Thus, it is important for you to consider whether your teen's poor hygiene is a sign of something more serious. If a teen was bathing normally but has suddenly stopped, and if you have noticed other symptoms such as moodiness, changes in their school performance or social behavior, or if they have started using drugs or drinking alcohol, then it may be time to seek help from a doctor. There may be a logical reason behind why the teen isn't showering, so you should spend some time reflecting on what those reasons might be instead of just assuming they are being lazy. For example, there's a teen who has very long hair, maybe they aren't showering because they don't have time to do their hair afterward. In this case, you could purchase them a shower cap, or suggest that they take a bath on the days that they don't want to wash their hair. Some people simply don't need to wash their hair every day. Maybe the young person is having a hard time finding the time to shower. Many teens have a lot on their plates with school, friends, extracurricular activities, and chores. It could be that they feel they can't find the time. If this is the case, maybe you can help them figure out a way to manage their time better, or even cut out one of their chores so they have 15 extra minutes to shower. Many times, teens rebel over little things simply to feel like they have some control over their lives. If you haven't already done so, consider asking the teen why they don't want to shower. Asking will hopefully help you figure out why they don't want to shower. Additionally, it will also show your teen that you acknowledge that they are growing up and have opinions and thoughts of their own. Hopefully, the reason they don't want to shower will be a fairly straightforward one. For example, if the teen doesn't like the smell of the products, then you can easily let them pick ones they do want. On the other hand, if their reason for not showering is more philosophical (e.g. they don't want to shower because they feel they should be natural, or something like that), then you're going to have to do a bit more work. You'll have to spend time educating them on the health implications of poor hygiene and hope that makes sense to them. If it comes to it, you may have to start revoking privileges.
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One-sentence summary --
Consider a teen's emotional state. Try to think of reasons why a teen might not want to shower regularly. Ask them why they don't want to shower.