My 3.5yo is learning to use a mouse, and it's super interesting.
He's mastered clicks and drags, but he hasn't yet figured out lifting up the mouse when run out of mouse pad. That's a tricky case where you deliberately break the relationship between mouse and cursor movement.
I'm super impressed by how many lint rules can be implemented with just eslint's no-restricted-syntax and selectors. Example:
{
selector: "ExportNamedDeclaration[declaration=null][source=null]",
message: "Add `export` directly to the function instead of a block export."
}