 Item number SCP-387 Object Class Safe Special Containment Procedures Due to the nature of this object and the almost non-existent harm it poses, it is stationed in a storage container in Site-19 with a standard lock. The red tube in which SCP-387 is contained does not possess any unusual properties itself, as has been determined through testing, but SCP-387 will not duplicate itself unless at least a layer of it covers the bottom of the aforementioned container. A sheet is available for those wishing to utilize SCP-387, and access will be revoked if it is not properly restored. Description SCP-387 is a tub of commercially available Lego, normal in design, and regular shapes not featured in normal sets such as circular wheels and prisms are also available. It has no brand name, and every company interviewed by undercover agents as far as the night after making a regular Lego. When the tub is not full, i.e. when it is partially or almost fully emptied, the Lego will solely duplicate themselves, stopping when the container is full. The interesting property of SCP-387 is that, when constructed by a human hand, see Addendum 387-D, the constructions will animate themselves, performing activities based on their surroundings. For example, if a Lego man, which is a man constructed using the provided humanoid parts, is placed within a car, it will begin to drive it. Further experimentation has revealed that the car, and indeed any complex machine, needs no internal engine or power source. The Lego people have some form of sentience as they interact with each other quite readily. If left over time, the constructed people in buildings will evolve. They will take on occupations based on the buildings around them. For example, some people will become firemen and use fire trucks if the corresponding objects are there. They will also use SCP-387 to construct more things to expand their society. Humans can interact with them quite peacefully, but if a human becomes hostile to them, they will immediately cease all activity and become inanimate. SCP-387 was found in February of 20, by Agent ██████████. During a long trade ride back to the city he lived in, Agent ████████ idly constructed a man from SCP-387, which was in a seat behind him at the time. Several seconds later it became animated. Agent ████████ quickly disassembled the man and delivered the item to Site-19 for analysis, where it now remains. The security tapes from the train were confiscated and destroyed before they could be reviewed. Optional information. SCP-387 should not be given to children under the age of 10, especially if said child is influenced by cartoons and television shows. See Addendum 387-B Experiment 387-A A small community of SCP-387 is formed in a testing chamber. A plane constructed from normal Lego was placed to the side of the community. Over the next three hours the following changes were observed. Several Lego men procured some equipment from SCP-387, heading over towards the plane. With incredible efficiency the Lego men constructed what was, for all intents and purposes, a working airport, the specified pieces having been supplied by SCP-387 without visible signal. A petrol tank zoomed over the said plane, apparently filled up with fuel despite earlier observations that vehicles constructed from SCP-387 do not require fuel, and the plane proceeded to literally take off, flying around the room at low speeds and altitude, seemingly to avoid crashing. Four planes of different make and design were formed soon after. Addendum 387-1 Judging by this, I'd say that constructions of SCP-387 have some form of understanding of the surrounding environment, and they are able to convert existing Lego to 387 by Dr. Arch. Experiment 387-B Several young children were given SCP-387 and were given instructions to use their imagination. The children who had their memories of this experiment removed began constructing various objects. After having noticed that they were animate, they excitedly conferred and began building several objects that they intended to use in battling each other. These included a transformer, an M1 Abrams tank, and several ████████. The children were instantly removed at which point the creations began to fire and eventually destroy each other, though not after considerable effort. Addendum 387-1 Now to fuck these children gain knowledge of the workings of an M1 Abrams tank, no less! I'm not responsible for cleaning out the mess those things make. If anyone is stupid enough to let children go to SCP-387, I am not recommending an upgrade to Euclid as the constructions did not fire whilst in the presence of humans. This has been tested with adults and proved just as correct. Dr. Arch. Experiment 387-C The red tub that contains SCP-387 is empty to Lego. Commercially available Lego is then placed in the tub for a minute. Constructed objects are inanimate and remain so. SCP-387 replaced. It is noted that the Lego placed within the tub also did not duplicate itself. Experiment 387-C-2 A single block of SCP-387 is placed within the red tub. It does not replicate more of SCP-387 as added until the bottom layer is covered, at which point it began to replicate itself quite rapidly until it had been filled. The amount of SCP-387 removed from the tub continued to work. Similarly, when an amount of SCP-387 hired in the tub's capacity was placed onto the tub, it shrank until the red tub was fully filled. Addendum 387-3 It appears that the red tub itself has no abilities by itself, but SCP-387 will not duplicate itself unless in that particular tub. Perhaps this is a copyright mechanism that stops copies of 387 being made. Further experimentation needed. Dr. Arch. Experiment 387-D A robotic arm was used to construct a car out of 387. It did not animate. This test was repeated with a human hand, at which point the car animated as usual. A dead hand from a recently dismembered agent was used to no response. The hand was then heated, which still provoked no response. Addendum 387-4 It appears that 387 responds to a pulse or some other detection of human life. Dr. Arch. Addendum 387-5 This SCP has been in high demand for extended use as further testing has revealed no more anomalies or features. In the personnel tested, SCP-387 has improved morale and attitudes by 87%. People are really kids at heart here. As such, I am recommended that all personnel be given free access for recreational use. Dr. Arch. Request approved. Experiment 387-E Once a normal community of 387 was constructed, a small mound of megablocks, a common copy of LEGO, was placed near the community. When this happened, everything constructed of 387 stopped moving, turned slowly towards the megablocks and ████████. Addendum 387-6 Jesus fucking Christ. Dr. Arch.