Okay kiddo, do you know what a pump is? It's like a machine that moves things from one place to another. Now, an electroosmotic pump is a special kind of pump that uses electricity and something called "osmosis".
Osmosis is when a liquid, like water, moves from one place to another through a material, like a membrane. It's kind of like when you pour some water on a sponge and it soaks it up. The water is moving through the sponge because of osmosis.
Now, back to the electroosmotic pump. This pump has a special material inside it that allows liquid to move through it with the help of electricity. When the pump is turned on, electricity flows through the material, and this causes the liquid to start moving through it. It's a bit like magic, but it's actually all about the way that electricity interacts with the liquid.
So, to sum it up: an electroosmotic pump is a special kind of pump that uses electricity and osmosis to move liquid from one place to another. It's a cool technology that can be used in all kinds of things, like medical devices and scientific equipment. Pretty neat, huh?