Recommendations
        
            - Print on thick paper, such as photo paper.
 
        
        
    
    
        Assembly
        
            - Cut out each disk.
 
            - 
                On both disks, cut two slits along the lines of the central
                cross.
            
 
            - 
                Attach the disks together using a split pin through the central
                cross. (The colored disk goes on top.)