In the last couple of weeks we’ve done some new LEGO Robot Challenges and I’m really pleased at how they turned out.

First was my LEGO version of the Hungry Hippo game.  The students were tasked with creating a robot that drives around gathering balls and marbles.  The robot that collects the most points worth of marbles and balls in 60 seconds wins the challenge.  The balls are the colored balls that are included in the robot kits.  The large balls are worth 5 points each, the marbles are worth 2 points.  Students had to come up with a strategy and then build to that strategy.  The best design drove around with a scoop on the front that shoveled the captured balls into a bin on top.  Many designs had rotating claws in front to direct the balls into a pen.

About a week into the challenge, students were tasked with doing a design review with another group.  They had to critique the other groups’ project and suggest ways to improve the design, then have the same done for their project.  All of the groups felt they got something out of the design review process.

The arena was our own Octagon I created out of 1×4′s.  Each side of the octagon was 24″ and the sides were held together with masking tape.  It was sturdy enough that the robots could bump into the walls and trigger a touch sensor.  The plan was to have the robots go head to head in the arena, but they all locked up so badly that each robot did individual one minute runs.

The latest challenge was a rope climb.  I first showed the kids a couple short videos on the space elevator and we had a short discussion on the cost benefits of such a system.  They were given a short week (4 days) to design a robot that could climb up a rope.  I hadn’t tried this before so I didn’t know what to expect.  I had a few robots climbing the rope within 30 minutes, so I had to up the ante.  Basically, they got a C if the robot climbed the rope.  If the climber carried a 0.5 kg weight up the rope, the group got a B.  If the robot managed to carry a full kilogram weight up the length of the rope, the students earned the A.  Only one group managed the A using an innovative design of tires and belts.

I’m going to challenge them to go back to the drawing board on this one and see who can carry the most weight up the rope.  After that, we are going to do Robot Wars in the Octagon.  The goal is to disable your opponent or remove them from the ring.  It should be fun.