When I think back to Crew at this age, I'm sure this is how I'll remember him:
Holding as many binkies as his hands can manage, organized on his tiny fingertips.
Despite my best efforts to hide the binkies during his waking hours, his favorite hobby is to locate, gather and confiscate them. One binky is not sufficient anymore. He must have several accessible options so he can swap them out every couple of minutes.