For my year 4-6 classes I created a number of models as shown below.
Students were then invited to pair up. They were given a picture of the model, the blocks to be used to create a model, and the instructions and rules below.
Students had to sit back-to-back, one student had to decompose the instructions, while the other student built from the instructions given.
This is a very challenging task that tests understanding and the ability to decompose instructions.