Build your pet
out of bricks.

Dozens, at every stage. An AI model checks each photo as you take it: the angle, the whole body in view, sharpness, one animal, and never the same photo twice. Another tidies each photo, taking out leads and backgrounds, and a third check compares the result with your original before we use it. You approve the 3D model yourself before we lay a single brick. Then every size is checked twice, by two separate programs: one designs the bricks, and an independent checker rebuilds everything from the finished brick list and trusts nothing the designer says about its own work.

We sample your pet’s 3D model along all three axes on the brick grid: one cell per stud across, one per brick height up. Each size gets its own height, picked from an estimate of how many bricks it needs, and two sizes that would come out almost the same merge into the bigger one. We pack the cells only with brick shapes and colours sold in your country’s LEGO® Pick a Brick store, then look for weak seams, where a few studs would hold a whole part on, and repack across them.

Legs are where brick animals usually fail, so they have their own rules. Every paw stands on the floor; a paw lifted in your photo is brought down to it. Each leg is tied into the body by a brick with two studs on top of the leg and two in the body. Where a thigh flares out wider than the leg below it, that part is built as body, not hung off the leg. A thin tail, which often comes out as a chain of loose specks, is joined back to the body. If a size still can’t be built soundly, we drop it rather than sell it, which is why slim dogs like greyhounds sometimes get fewer sizes.

From your pet’s own coat. We read the 3D model’s colours the way light really mixes, so the edge between light and dark fur doesn’t turn muddy. Each spot then takes the nearest LEGO® colour that’s actually sold in that brick shape in your country. Lone specks that would look like mistakes take the colour around them, but eyes, noses and paw pads always keep their dark bricks. Coats that bricks can show two ways, like brindle, also get a Natural version that follows the fur more closely, and you choose.

Partly, and carefully. Bricks nobody will ever see take the colour of the bricks around them, which keeps your parts list short. In the body of a standing pet we then try taking out bricks buried deep inside. We keep a change only if the outside looks exactly the same from every direction, underneath included, the outer shell, inner ribs and the bricks holding up the back all still pass, and your bricks cost less. Faces, legs and tails are never hollowed.

We build every size in a simulator before you see it. Bricks go on in order, as you would place them: each one has to be supported when it goes on, with a clear path to lower it in and press it down. Any part hanging below a join is checked to make sure the studs above can carry its weight. At the end we let go, and the pet has to stand on its own. The simulator treats clicked bricks as rigid, so it can’t measure how firmly they grip. We tell you that rather than claim more.

Only after you choose a size, from that exact brick list. It builds from the floor up, a few bricks per step. Legs and other parts that are easier to make on their own are built beside the model and pressed on, as you would at a table. Every picture is drawn from the real bricks, and a separate checker replays the whole book to make sure each step works in that order and the parts list matches the book brick for brick.

We regularly make an AI build the pet from it. A fresh AI model gets nothing but the guidebook PDF and a simulated table of bricks. It can’t see the answer, and the table only tells it what a real one would: a brick doesn’t fit, or falls off. We watch it build live, mark every brick right or wrong against the design and score the finished pet. When it goes wrong, we find the first picture it misread and redraw it. If an AI can follow the pictures without a word of help, so can you.

Yes. Our brick engine is deterministic: the same 3D model and the same country’s bricks always give the same pet, brick for brick. That means we can test any pet again exactly and see precisely what each improvement changes. Before every engine release we rebuild a set of real pets, from greyhounds to corgis, beagles and cats, and they have to keep their sizes.