Well, sciens is a really big word that means the idea of knowledge in general. It's all about learning new things and understanding the world around us.
Imagine you have a big pile of puzzles in front of you - each puzzle is a different thing you don't quite understand. Sciens is like the tools you use to put those puzzles together and see the bigger picture.
Say you have a puzzle of a tree but you don't know why it loses its leaves in autumn. Sciens helps you find the pieces of information you need to figure out the answer. You might learn that trees lose their leaves to conserve energy during colder months or that it helps prevent damage from snow and ice.
So sciens is kind of like a big treasure chest of information and tools that helps us solve puzzles and learn more about the world we live in.