2014-2015(I think) Vex game: boxes to be stacked on cylindrical posts
2015 FRC game: boxes to be stacked, and cylindrical cans to cap those stacks
2015-2016 Vex game: balls that can be scored in low and/or high goals, climbing/scaling
2016 FRC game: balls that can be scored in low and/or high goals, climbing/scaling
2016-2017 Vex game: cubes and "stars" that are thrown across the field, climbing/hanging, and a "fence" in the middle of the field
2017 FRC game: inflatable cubes? Stars or those
spiky inflatable balls would be unusual pieces...
__________________
"You know, it's amazing how many things you can take apart with just one ordinary screwdriver!" - Calvin, from Calvin and Hobbes
"There's nothing a little duct tape and surgical tubing can't accomplish." - Sheldon J. Plankton