How to sort and store Technic-style parts: why type beats colour

Sort Technic-style parts by type, not by colour, and give the rare parts their own small box. Most Technic-style pieces are light grey or black, so colour sorting leaves two huge piles that are nearly as slow to search as the tub you started with. Type bins (pins, axles, beams, gears, connectors, wheels) split the collection into groups of pieces that look different from each other, which is what makes a part quick to find. And the very first step, a small box for motors, battery boxes and switches, saves a surprising amount of digging on its own.

This guide uses the site's own parts list as the collection: about 1,400 pieces of 108 different parts, the estimated contents of the three recommended kits.

Why colour sorting disappoints

Colour is the obvious first idea, and many builders start there. One long-running thread on a building forum describes the usual journey: keep sets together, then sort by colour, then switch to sorting by part type, sometimes going back to colour within each type later.

For Technic-style parts the numbers explain why. In the parts list:

• light grey: about 450 pieces (smooth pins, beams, bushes and most axles)
• black: about 450 (grippy pins, track links and thin beams)
• every other colour together: about 500

So two colour bins hold roughly two thirds of everything. Looking for a black axle in the black bin means sifting through hundreds of black pins and track links first.

Why type works better

Sorted by type, the same collection falls into nine groups, and each one holds pieces that are similar in job but different in shape:

• pins and bushes: about 440, the biggest group by far
• tracks and springs: about 310, most of them track links
• gears: about 210
• beams: about 160
• axles: about 120
• connectors: about 110
• wheels, frames and electrics: under 30 each

A pin bin is still big, but pins are also the parts builds need most, so you find one quickly. For the less common parts, a type bin cuts the search to a small, easy pile.

Builders on the same forum give a good rule for how far to go: split a bin when it takes too long to find one piece in it. A tub of pins is fine; a tub of every axle length mixed together, perhaps not.

Test it: how much searching does a build take?

The lab counts how many pieces you would handle to find everything a build needs, if you picked pieces up one at a time. Real eyes are much quicker than that, so read the totals as a comparison between storage methods, not a stopwatch.

For the Motor Buggy, a first motor car with 45 pieces, the model ranks the methods clearly: one tub is slowest, a tub plus an electrics box saves about a third, colour bins do better, type bins better again, and a bin for every part is fastest. For the 13-piece Tiny Roller, colour and type come out about even, because it uses only a few common parts. The bigger and more varied the build, the more type bins win.

A setup that works at home or in class

1. Box the rare parts first. Motors, battery boxes, switches, lights, the receiver and the remote: a dozen pieces, one small box. This is the fastest win, and it also keeps the expensive parts safe.
2. Sort the rest by type. Start with the nine groups above. Shoebox-sized tubs work.
3. Split the biggest bins when they get slow. Pins usually come first: grippy black pins and smooth grey pins look alike, but they behave differently in a build. Then axles by length.
4. Sort by colour inside a type only if it helps. Inside a pin bin, colour actually helps, because the pin types come in different colours.
5. Tidy up as part of the build. Pieces go back to their bin at the end of each session, not at the end of term.

If a builder checks parts against a build's list before starting, a sorted collection also shows quickly whether anything is missing.

For classrooms and clubs

With a shared collection, the same rules hold, and labels matter more. Put a picture of each part on its bin, not just a word: "half bush" means nothing to a new builder until they see one. A tray per group, filled from the type bins before the session, saves the whole room queuing at the pin tub. The building club guide has more on running sessions, and the first builds list is a good place to start a new group.