What invention lets you look right through a wall?

Why this works

This riddle plays with the concept of "looking through a wall," which initially sounds like a magical or impossible feat. However, the clever twist here is that a window is indeed an invention that allows you to see through the physical barrier of a wall. By using the word "look," the riddle invites you to think about transparency and visibility, leading to the lighthearted realization that windows are designed specifically for this purpose!