Self-assembly (Whitesides and Grzybowski, 2002) can also be seen as a form of self-organization. There have been several examples in hard ALife of self-assembling or self-reconfigurating robots (Murata et al., 1994Holland and Melhuish, 1999Zykov et al., 2005Dorigo et al., 2006Støy and Nagpal, 2007Ampatzis et al., 2009Rubenstein et al., 2014Werfel et al., 2014).