Students work in groups (can be done individually) to follow a set of instructions and create a picture. They need to visit the ‘main memory’ and fetch the next instruction. Then decode the instruction which may include retrieving data from memory. They execute the instruction and store it by drawing the result on paper. Activity can be done as a competition. There are a few unused instructions which means they need to keep their program counter accurate. sheet requires denary to binary conversion to start, but this step can be done for the students if that has not been covered