This article in ScientificAmerican describes new techniques being used for some very interesting stuff, as the study finds a possible brain signature of consciousness in infants as young as five months

“The data reveal that one-year-old children, at least, do have a brain signature similar to that associated with conscious perception in adults. The electrical signal is perhaps a third of the speed it is in an adult, reflecting the delayed myelination (myelin is the covering of the axon that speeds up transmission of long-distance electrical communication) and immaturity of the young brain.

Of course, the extent to which they truly do have a subjective experience of a smiling face is difficult to ascertain for now. Clever scientists in the future will likely develop some fancy tech-nique to read out the content of these young minds.”