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The way the Bob 3,000,000 is powered is by the solar panel in the back of the truck. There are four inch wheels so the body can't touch the ground so any dust gets in. There are grips on the wheels so the con moves in other places like up hills.If there is a lot of dust on the ground there will be a fan so it will blow all the dust away. The skooper can't hold too much but it can move faster. There is a parachute that you can't see but it is in the robot so, in case it is climbing up a hill and falls into a crater the rover will not break it might be a little damaged thoe. The last thing that is on my rover is there is a camera on the front so you can tell where it is going.