In this activity, use an NXT brick equipped with two ultrasonic sensors to emulate a Theremin, an electronic instrument. One sensor will change pitch as distance to an object changes, and the other sensor will change volume as the distance to an object changes. The Theremin is meant to be played wit...

In this activity, use an NXT car equipped with an ultrasonic sensor to navigate without bumping into obstacles such as walls or people.

Determine the best structure for a sturdy car. Motors do not have to be attached, but the car must roll with wheels and skid plates. To test the car design drop the car from a height of 4in to check if it survives.

In this activity, design and construct an RCX sturdy car and program it to be controlled by touch sensors that can push “dirt”
See "Bulldozer-RCX" PDF for detailed instructions.

In this activity, a group of people use a number of RCX's to determine one another's birthdays.
See "Birthday Decoder" PDF for detailed instructions.

In this activity, use an NXT car 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
See "Find The Hidden Letter" PDF for Detailed Instructions

In this activity, use an NXT car equipped with a light sensor to determine the hidden Morse Code message (under a table or in another room). The message will be determined using light sensor collected data on a pass over of the message.
See "Morse Code" PDF for detailed Instructions

In this activity, use an NXT and a light sensor to collect data about the light conditions of the room. Can you find light sensor readings in the range of 0-30? 60-90? 90-100? Draw conclusions and make generalizations about light intensity in the room.
See "Scavenger Hunt" PDF for Detailed Di...

Does anybody have plans for a seismograph?

This is a great introductory activity to mechanical engineering. Simple machine kits were used to create sturdy carts, which would transport a pumpkin (orange marble) and its passenger (lego figurine) down a ramp.