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 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 and a light sensor to trace the tracks of an Egyptian tomb raider. The police need to know data about the tomb raider so that they can stop him from robbing other tombs. Can you determine the time the burglar entered the tomb and what path the burglar took around the roo...

In this activity, use an RCX and a light sensor to trace the tracks of an Egyptian tomb raider. The police need to know data about the tomb raider so that they can stop him from robbing other tombs. Can you determine the time the burglar entered the tomb and what path the burglar took around the roo...

Construct a rotation sensor with the highest degree of accuracy and repeatability.