Before You Begin


What’s the point?

To give students an opportunity to explore additional ways of getting information from a touch sensor and to use these commands to solve related problems.


What you will need:

   For each group:

·    The Robotics Inventions™ kit

·    A disk

·    A copy of the Technical Guide

·    Roverbot

·    A building bin (optional)


   For the class:

·    Transparencies # 4, 5a-d


Programs used: All the programs used are optional. They are listed and illustrated in the Programming Highlights section.



Prepare Ahead:

  1. Make enough copies of the Touch and Go! student activity sheets for each student to have one.



Tech Guide


© The LEGO Group

Activity Overview

This activity is designed to give students opportunities to use the touch sensor in a variety of problem settings. As students write programs, it is important to help them think beyond the effects of single blocks. Transparency # 4 is designed to facilitate an understanding of how information flows in a program.

In the first part, you will discuss with students the advantages of adding a touch sensor to a robot. Then you will have students build a bumper and attach it to Roverbot so they can set it free to move through the environment autonomously.

Students will then follow the activity sheet and solve selected problems from the RCXtra section. Throughout the process, you will help students understand that programs rarely work the first time, and that reworking the solution (or debugging a program) is as important a part of the work as writing the program in the first place.

You may also offer students the challenge of solving the “Table Bumper” problem. This involves adding an arm-like bumper with a touch sensor in each arm to Roverbot and programming it so that it can move on a table without falling off the edge. The table bumper can provide a nice transition to a similar problem in the Lighten Up! activity, using a light sensor


 Return to Top