Benefit no. 3: Crates can be folded into pallets, which means that it's in a warehouse and . Once the crates are in the congress hall it is easy and not at all time-consuming to build stands. A stand is built by adding and pilling crates. If, for example, we turn a crate towards us we can make a shelf, on the other hand, if we turn the crate away from us we make blank walls, which are needed for signs and pictures. Even hired students with can build such stands. This .