Blocks
A much bigger block with a cavity/hole going through the center.
Bags
An empty big bag.
Gravel
Aggregate mix
Small empty heavy duty sand bag.
Concrete block that weighs one tonne.
An empty small bag.
Quarry Products
Drainage stone-small smooth rounded stone
Regular 4" block with a 30 degree offset.
Chips
Screenings-Very dusty gravel
Plastering sand
Regular 4" block with a 90 degree offset.