Hey kiddo! Do you know what blocks are? Like the ones you play with that fit together to make things? Well, polycube is kind of like that, but on a bigger scale.
A polycube is made up of smaller cubes that are all connected to each other to make a big shape. Think of it like building with legos, except instead of just stacking them on top of each other, you can connect them in different ways to make all sorts of shapes.
What's really cool about polycubes is that they can be used for all sorts of things. For example, scientists use polycubes to study how liquids move through different materials. Builders use them to create 3D models of buildings and cars. And even chefs use them to make fancy desserts in precise shapes!
So polycubes are really just a bunch of little cubes stuck together to make bigger shapes, but the possibilities of what you can make with them are endless!