Last year we did a ball gathering challenge. This is an example of a students final project. These students decided to use gears to grab and trap the balls in the center of the bot.
Here is an other example of a ball gathering bot. This team chose to use a convener belt to gather the balls. Both methods are unique and provide different design and strategic challenges.
This is a third example of a ball gathering bot. This one lowered a cage down onto the balls and drove around with them inside.
Here are a few examples of the unique designs that won various challenges in the past. Any thing from part of an assembly line to sumo bots to ball gathering, there's a bot for everything.