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, 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.

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

In this activity, design and construct a chair that keeps Mr. Bear (a floppy stuffed animal) from falling backwards, forwards, to the left and to the right. The safety of Mr. Bear is in your hands.
See the "Chair for Mr. Bear" PDF for detailed instructions

In this activity, design and construct a windsail mechanism connected to a rotation sensor and an RCX to measure the speed of the wind.
See "Capture the Wind -RCX" PDF for detailed instructions.

In this activity, design and construct a windsail mechanism connected to
a rotation sensor and an NXT to measure the speed of the wind.

In this activity, design and construct an RCX or NXT crane controlled by motors and a touch sensor remote control.
See "Crane" PDF for detailed instructions.

In this activity, design, construct and program an RCX or NXT dancing
robot that has at least two moving parts and at most two motors. Set your
robot's dance to music.

In this activity, design and construct an RCX car that can bridge a one
foot gap without falling.