Understanding littleBits Bits: A Glossary for New Teachers

Quick answer

A littleBit is a single snap-together electronic module that does one job, and every circuit follows the same order: power, then input, then output, with wire Bits stretching the chain. If you can read the color code and remember that order, you can explain almost any littleBits build to a class without a manual.

New teachers usually meet littleBits the same way: a bin of small colored modules, a pile of student enthusiasm, and no clear idea which piece does what. The good news is that the system is deliberately simple. Every Bit belongs to one of four families, and the families have a fixed order in a circuit.

This glossary covers the littleBits terminology you will actually use in a classroom, from power and input to output and wire, plus the two specialty Bits that confuse people most. Keep it open during your first build session and the vocabulary will stick within a lesson or two.

What are the four main littleBits bit types?

Every circuit is built from four families. Power Bits supply energy, usually through a battery or USB power module. Input Bits sense or trigger something, such as a button, dimmer, or sound sensor. Output Bits create the visible or audible result, like lights, motors, and buzzers. Wire Bits carry or modify the signal between them, letting you extend a circuit or change how it behaves.

The order is not a suggestion. A circuit that starts with an output Bit simply will not work, which is why teaching the sequence early saves a lot of troubleshooting later. Once students can sort a pile of Bits into these four groups, they can plan a build before they snap anything together.

• Sort Bits into four trays labeled power, input, output, and wire so students self-check before building.
• Ask students to say the chain out loud: power, input, wire, output.

How do the littleBits color codes work?

Color is the fastest way to identify a Bit's family. Each family has its own color, so a glance across a table tells you whether a student has grabbed an input when they needed an output. This matters most in mixed-age classrooms where reading labels is slower than recognizing color.

Color coding also makes cleanup and inventory realistic. If you store Bits by color, you can see at the end of a lesson which family is missing. That single habit prevents the most common classroom problem with littleBits: a build that cannot be completed because one critical Bit has wandered into another bin.

• Photocopy a color key and tape it inside each storage lid.
• Assign one student per group to check the color order before power is switched on.

What is a wire Bit and when do you need one?

Wire Bits do not sense or produce anything on their own. They carry a signal across a gap, split it, or change its behavior so a circuit can do more than a straight line of modules. In practice, they are what turn a simple demonstration into a project students want to keep improving.

You need a wire Bit whenever the physical layout of a build gets in the way. If the power source must sit at the back of a cardboard robot and the output at the front, a wire Bit bridges that distance. If you want one input to affect two outputs, a wire Bit makes the split possible.

• Keep a small reserve of wire Bits at your desk; they are the first thing groups run out of.
• Label longer wire Bits with tape so students can find the right length quickly.

Which specialty Bits should new teachers know first?

Two specialty Bits come up constantly in beginner projects. The littleBits o9 bargraph shows how much signal a Bit is receiving using five LEDs in different colors, which makes an invisible signal visible. The littleBits i33 envelope shapes the loudness contour of a sound so it behaves more like an acoustic instrument such as a piano or saxophone.

Neither is required for a first circuit, but both are excellent teaching tools. The bargraph turns signal strength into something students can watch and measure. The envelope gives a sound project a more musical result, which is often what keeps students iterating instead of moving on.

• Use the bargraph when students ask how strong a signal is.
• Pair the envelope with a sound input when a buzzer project sounds too flat.

How do you choose your first Bits without overspending?

Start with a small set that covers all four families rather than a large collection of one type. A single power Bit, two or three inputs, two or three outputs, and a couple of wire Bits give you enough combinations for weeks of lessons. Adding specialty Bits later is easy once you know which projects your students return to.

If your program includes engineering challenges rather than only electronics, a structured kit can be more efficient than buying individual Bits. The Blueprint Bit Kit contains 17 electrical Bits covering power, input, output, and motor functions, plus 16 mechanical parts, and it is designed to work with the mechanical parts in the Build Kit to form an Engineering Kit. It also includes new challenges and two additional units of lesson plans, which shortens planning time for a new teacher.

• Buy for the projects you will actually run this term, not for the full catalog.
• Check whether a kit includes lesson plans before comparing prices.

Do you need a repair plan for classroom Bits?

Classroom hardware gets dropped, stepped on, and packed away in a hurry, so repair coverage is worth a look once your investment grows. Sphero offers plans at different coverage levels and durations, including the 1 Year Product Repair under $2,500.00 (ACC + PREPAID), which covers repair for one year from activation, applies to products valued under $2,500.00, and includes prepaid shipping for eligible service.

Read the eligibility limits carefully before buying. Coverage is tied to product value and plan duration, and an item outside the stated value range is not covered. If your Bits live in a single classroom and rarely leave the building, a smaller plan may be enough; if they travel between rooms or schools, a longer term can make more sense.

• Record purchase dates and product values before choosing a plan.
• Match the coverage term to how long you expect to keep the equipment.

Teacher FAQ: quick answers

What is a Bit in littleBits?

A Bit is a single snap-together electronic module that performs one function, such as supplying power, sensing input, producing output, or carrying a signal. If you can name its family, you know where it belongs in a circuit.

What order do Bits go in?

Power first, then input, then wire Bits as needed, then output. Reversing the order is the most common reason a build does not work. Have students say the order aloud before snapping anything together.

How do I identify a Bit quickly?

Use the color code. Each family has its own color, so you can sort a mixed pile without reading every label. Color sorting doubles as end-of-lesson cleanup.

Which Bits should a new teacher buy first?

Choose a set that covers power, input, output, and wire, or a structured kit such as the Blueprint Bit Kit that includes all four families plus lesson plans. Coverage of all four families matters more than total Bit count.

Do specialty Bits belong in a first lesson?

Not required, but the littleBits o9 bargraph and littleBits i33 envelope are strong additions once students understand the basic chain. Introduce them when a project needs visible feedback or better sound.

Bits worth knowing by name

• littleBits o9 bargraph: The bargraph shows how much signal the Bit is receiving with a display of 5 light-emitting diodes (LEDs) in different colors, and it can be paired with a dimmer to make an adjustable lamp. It turns signal strength into something students can see, which makes abstract circuit talk concrete during a lesson.
• littleBits i33 envelope: The envelope modifies the loudness contour of a sound, taking a sound input and shaping it into something you would hear from an acoustic musical instrument like a piano or saxophone. It is the quickest way to make a sound project feel musical rather than mechanical, which keeps students refining their build.
• Blueprint Bit Kit: This kit contains 17 electrical Bits, including power, input, output, and motor Bits, and 16 new mechanical parts, and it works with the mechanical parts in the Build Kit to make an Engineering Kit, with new challenges and two additional units of lesson plans. It covers all four Bit families in one purchase and includes lesson plans, so a new teacher can run engineering builds without programming.
• 1 Year Product Repair under $2,500.00 (ACC + PREPAID): This plan provides one year of product repair coverage for items valued under $2,500.00, with prepaid shipping for eligible service, and covers repair for one full year from the date of activation. It is a straightforward way to protect a starter classroom set, provided the equipment value stays under the stated limit.

Learn the four families, trust the color code, and build in the order power, input, wire, output. That is enough littleBits terminology to run a confident first lesson, and the specialty Bits and kits can follow once you know which projects your students love.