When looking through my camera roll, I recently found some pictures of a weekly magnetic puzzle that never made it up on the blog this school year. Imagine that...
The puzzle is called Square-in-Square, and it's a creation of the brilliant Peter Grabarchuk (affiliate link).
You are given sixteen rectangles. Among these rectangles, only two can be placed next to one another to form a perfect square with another perfect square depicted on it. Can you find the two pieces? Or will you be tricked by the fourteen imposter pieces?
At the time I discovered this puzzle and typed it up for my classroom, it was available on Puzzles.com, one of my favorite online sources for puzzles. That website has since been bought out by a jigsaw puzzle company and turned into a website that redirects you to Amazon to sell you jigsaw puzzles. Thanks to Internet Archive, there is an archived version of the website I can point you to now. Want to browse the other free printable puzzles that used to be available, here's an archived link to the general collection of puzzles that used to be available.
The only flaw I've found with using this puzzle both with a group of teachers at a presentation I gave last summer and with the students in my own classroom is that people don't read the instructions carefully enough. I've had multiple people try and pair up ALL the pieces instead of finding only the two pieces that actually pair up to form a perfect square in a square.
Want the printable version I typed up for my own classroom? You can download it here.