you can also sort out pieces by similar shapes.” Speaking of shape, it’s worth noting that most puzzles you likely encounter are ribbon-cut puzzles, which means they’re more grid-like.

Putting the last piece of a project together and finally finishing it up is a satisfying feeling. When the last piece of a puzzle like that is a literal puzzle, though, it’s even better.

For instance, here’s one way to form a swan shape using Tangram pieces: But it’s not the only way to make a swan. Can you find others? If you do not have the physical puzzle at hand ...