Water Tricks Part 1 Make pins float!

You'll need: large glass bowl, water, small square of bathroom tissue, straight pin 1. Fill a bowl with water. 2. Very carefully set a piece of tissue in the water. It should float. 3. Gently rest a straight pin on top of the tissue. After a few minutes, the tissue sinks. The pin is left resting on the water's surface.

How it works: Water molecules form an extra thick layer at the surface. This layer acts like a skin. Some objects are light enough to rest on this skin without sinking. The tissue and the pin are light enough to float on the water. As the tissue soaks up water, it becomes heavier, and it ends up sinking.

Click here for Water Tricks Part 2

Create water bugs that move    across water!