To conduct this activity you will need to purchase about 10-12 Hexbug Nanos. I recommend fishpond.com. Explain to the students that Hexbug Nanos are robotic toys that move and react with sensors. Show the students the following youtube clips that show how the Hexbugs manoeuvre around obstacles.
Explain to the students that they will be working in teams of three to construct and create their own maze. Firstly get the students to draw a maze design that they will be able to build. Give each team the lid from a box of A4 photocopy paper. Cut an entry and exit opening for the students. Get them to make a mark where they want the opening to be cut. Pre cut several strips of hard cardboard with a guillotine (this will make it easier and quicker for the students to commence construction). Students construct their mazes using the strips of cardboard and masking tape. When their maze is complete they can test it out with their Hexbug Nano. On the worksheet the students can measure and record the distance travelled by their Hexbug. Then the students are ready to conduct their trials. For each trial the students place their Hexbug at the entry point and using a timer record how long it takes for the Hexbug to travel through the maze and out through the exit. If the Hexbug gets 'stuck' they re to record at which point it gets stuck and then make improvements to the maze. The goal is to continually improve the maze so that the Hexbug improves it's travel time with each trial. The worksheet includes further questions on evaluating their investigation.