LEGO Ideas and CUUSOO

Pop-Up Book

A real LEGO book that actually pops open into a fairy tale, and yes, it works.

Brick Rated Score

4.3/5

Set 21315 · 2018

Pieces859

Minifigs4

Year2018

Set number21315

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The verdict

This is one of those rare sets that makes non-LEGO people gasp when you open it, because it genuinely behaves like a pop-up book.

The mechanism is clever and smooth, the two swappable stories (Little Red Riding Hood and Jack and the Beanstalk) give you real reasons to keep it out, and the printed cover is gorgeous. It is small for the money and the pop-up illusion is best from the front, but as a display piece with a party trick built in, I adore it. Perfect if you love mechanisms and want something that reads as decor rather than a toy on a shelf.

Best for: adults who want a display piece that surprises people when it opens

The full review

What it is

I did not expect to be charmed as hard as I was by this one. The Pop-Up Book is exactly what the name promises: a LEGO book you open, and the pages rise up into a little three-dimensional fairy tale scene. The default build is grandmother's forest cottage from Little Red Riding Hood, complete with an opening door, a kitchen, and a bed that a minifigure can actually lie down inside. The thing that got me is how convincingly it reads as a real object. Sit it on a shelf closed and it looks like a decorative storybook. Open it in front of someone who does not build LEGO and watch their face, because the reveal genuinely lands every time.

The catch

I will be straight with you about the trade-offs. At 859 pieces this is not a marathon build, and the two story inserts go together quickly once the book base is done, so if you measure a set by hours in the chair this will feel short for the money. The original price was 69.99 dollars, and because it retired back in 2019 you are now looking at prices that have drifted above that, so it is not the bargain it once was. The pop-up illusion also has a best seat in the house: from the front it is magic, but from the side you can see the mechanism doing its honest work. None of that ruined it for me, but I would rather you know before you buy.

Who it's for

If you love mechanisms, or you want a display piece that doubles as a conversation starter, this is an easy yes. It suits adult builders who care about clever engineering and want something that looks intentional on a shelf rather than a big toy. It is also lovely for reading-together households, since you can swap in Jack and the Beanstalk and get a whole second scene from the same base. I would only steer you away if you are chasing piece count, hours of building, or a big centerpiece, because this one wins on cleverness and charm, not scale.

The parts story

What the build is actually like, and the pieces worth knowing about.

The build splits neatly into two halves: the book itself, which is a satisfying little study in hinges and swivels, and then the interchangeable story stage that clicks onto the covers with a Technic pin at each end. The book portion is the interesting part to assemble because you can feel the mechanism coming together, and the payoff when you first open the finished cover and the scene stands up is genuinely delightful. The story scenes go faster and are more about playful detail than engineering, which keeps the whole thing from ever feeling fiddly.

For parts collectors there is real treasure here. The two brown 8x16 tiles were new in that color, and one carries the printed cover with an intricate gold damask pattern and the title lettering, which is some of the nicest graphic design LEGO has put on a tile. There are printed 1x6 tiles in reddish brown honoring the fan designers Allemann and Davis in gold, plus useful hinge bricks and 1x12 bricks in dark green. Add four excellent minifigures, including a Wolf disguised in Granny's clothes with printed glasses and lipstick, and the parts value punches above what the modest piece count suggests.

Fun facts

01The set began as a LEGO Ideas fan submission by Grant Davis and Jason Allemann in 2016, and their names appear in gold on printed tiles inside the book.
02One book base builds two complete fairy tales: Little Red Riding Hood is the default, and Jack and the Beanstalk swaps in on the same Technic-pinned mounts.
03The Wolf minifigure wears a torn version of Granny's exact outfit, with glasses and lipstick printed onto his face to sell the disguise.
04It includes a bed design roomy enough to actually tuck a minifigure inside, which reviewers singled out as one of the better LEGO beds.