Eon opens this lesson with a word his dad uses a lot: review. "Do you know what review means?" his dad asks. Eon does — it means going back over something you already learned to check that it really stuck. So before learning anything new, Eon has to pass a little test.
A quick review of the cursor
The test is simple: move the mouse and watch the arrow on the screen. "That arrow is called a cursor," his dad reminds him. Eon moves the mouse up, down, left, and right, and the cursor follows each time. He passes! "You already mastered it," his dad says.
This little arrow has more than one name. Eon learns you can call it a cursor, a mouse cursor, or a pointer. Why "pointer"? Because it's like using your finger to point at something — except you can't reach your hand into the screen. So the mouse becomes your digital finger: you move the mouse out here, and your pointer points at things in there.
One small problem: the cursor is hard to see because it's tiny. So Eon's dad makes it "really, really big" on screen — a handy trick so you never lose track of where your pointer is.
The mouse is more than one button
Now the new part. A mouse isn't just one smooth shape — it has parts. Eon points to the middle and says, "I don't remember what this thing does." His dad answers: that's the scroll wheel. So most mice have two buttons (one on each side) and a wheel in the center.
Here's the surprise. Eon's dad is left-handed, so he uses a special left-handed mouse — and that changes which button does the clicking. On his mouse, the right button is the big "click" button. Press it, and that's called a click. "Single click to select," his dad explains. (On a normal right-handed mouse, the left button does this job instead — the mouse is just mirrored.)
Selecting and deselecting a cube
Time to actually use that click. On the screen is a cube, and the goal is to select it. First, the grip: Eon's dad shows how to hold the mouse with the middle finger and index finger resting on the buttons. Then you press the big button — click! — and the whole cube lights up as selected.
But here's the part Eon practices most: how do you turn the selection off? You move to empty space and click again. That deselects it. His dad does it over and over so it sinks in: "Select it and deselect it. Select it and deselect it." Click on the cube to grab it; click on nothing to let it go. That one idea — click an object to select, click away to deselect — is the real skill of this lesson.
The scroll wheel? Eon and his dad save that for next time. For now: high five, lesson learned.
Try it
Find a mouse and a computer screen. First, just move the mouse and watch your cursor (your pointer) follow — up, down, left, right. Then open any folder full of icons and play "select / deselect": click once on a file to select it (it should highlight), then click on empty space to deselect it. Do it five times in a row, saying it out loud like Eon: "Select it… deselect it." Bonus: is your mouse set up for a right hand or a left hand? Which button does the clicking?