1. Echo locator

    Echo locator

    How could you build a device that uses sound to indicate the distance to the nearest object? For example, as an aid for a person with vision impairment. Other than using the Ultrasound Sensor, are there any other sensors that could be used to measure distance? Resources Echo Locator lesson...

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  2. Dancing robot

    Dancing robot

    Design, construct and program a dancing robot that has at least two moving parts and at most two motors. Set your robot’s dance to music. Resources Dancing Robot lesson plan – ROBOLAB + NXT-G (PDF)  

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  3. Find the hidden letter

    Find the hidden letter

    In this activity, use a robot equipped with a light sensor to determine the hidden letter message (under a table or in another room). The letter will be determined using light sensor collected data on 3 passes over of the letter.      Resources Find the Hidden Letter lesson plan...

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  4. How to write efficient NXT-G programs

    How to write efficient NXT-G programs

    Writing Efficient NXT-G Programs (PDF) describes how to make your NXT-G programs as efficient as possible to create complex behaviours with a minimum of memory. These techniques are particularly relevant for competitions such as FIRST LEGO League (FLL) and RoboCup Junior, in which competitors often download several complex programs onto...

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  5. The stubborn car

    The stubborn car

    Think of a way to design and construct the stubborn car: a car that will always return to its original place no matter how far it is rolled away from its starting point. Tip: How can you track the rotary motion of the car’s wheels? This challenge provides a great...

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  6. Relay race

    Relay race

    Design and construct a team, comprising of  three cars, to compete in a relay race. Only one car may move at a time. Hint: Is there a way to send messages between team mates?  Resources Relay Race lesson plan – ROBOLAB + RCX (PDF)    

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  7. Tomb raider

    Tomb raider

    The idea of this challenge is to have students set up several light sensors to log data over time. After the setup is complete, run the programs, turn off the lights in the room, and have the students leave. Walk around the room near the different sensors with a flashlight....

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  8. Ultrasonic touch guitar

    Ultrasonic touch guitar

    The idea of this radical challenge is to use the ultrasonic sensor, touch sensors, and buttons on the NXT to create a guitar. The ultrasonic sensor can control the pitch of the note based on the location of the user’s hand, and the touch sensors can control other parameters of...

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  9. Zombie attack

    Zombie attack

    In this activity, a group of students each build a robot. Each robot is assigned a number. It will then have to tag other robots with the number by using mail. Five tags and the robot takes on that robot’s number. The winner is the robot that has given its...

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