Kids struggle with neurons and neural transmission. This breaks down the process and the parts into smaller bits of information for kids to understand. There is building a neuron out of candy, making neural analogies, a short reading on neural transmission that simplifies the process, and an activity that makes neurotransmitters into a superhero or mascot.
This activity could easily be broken up into a stations type activity where kids move from station to station.
VERY student friendly and very interactive and "hands on".