Amygdala:
http://brainmadesimple.com/amygdala.html
https://www.boundless.com/psychology/definition/amygdala/
Hippocampus:
http://www.kidsdiscover.com/quick-reads/meet-hippocampus-memories-go-make-sense/
http://kidshealth.org/kid/health_problems/brain/memory.html
Thalamus:
http://brainmadesimple.com/thalamus.html
Hypothalamus:
http://brainmadesimple.com/hypothalamus.html
http://kidshealth.org/kid/htbw/brain.html#