Root a Pothos Cutting in a Jar
You can make a brand new houseplant without buying a seed. All you need is a healthy pothos vine, a pair of clean scissors, a clear jar and some water. This method is called taking a cutting, and it works because many plants can grow roots from a piece of stem.
First, ask an adult before you cut a plant that belongs to someone else. Look for a vine with several leaves. Find a node, which is a small bump on the stem where a leaf joins. Roots will grow from nodes, so each cutting needs at least one. Snip about an inch below a node, and keep two or three leaves above it.
Next, fill the jar with room-temperature water and place the cutting inside so the node is under the water but the leaves stay dry. Set the jar in bright light, but not in harsh direct sun, which can overheat it. Every few days, pour out the old water and add fresh water so it stays clean.
Within a few weeks, you should see thin white roots emerging from the node. When the roots are a few inches long, move the cutting into a pot of soil and water it well. Because the new plant has the same genes as the original, it will look just like its parent.