We have partnered with Perfect Package, to provide a full package with all the necessary materials for this class. They stock all items and ship on time. It is highly recommended to purchase the package. Here is the link: 

http://www.perfectpackageonline.com/product/electricity-measuring-with-a-voltmeter-hands-on-package/2?cp=true&sa=true&sbp=false&q=false

Additional Materials required for session experiments: (not included in the kit above)
Session 1: 
  A collection of batteries, preferably some old and some new

Session 2:
  A cup of clean water
  Some table salt
  
 Session 3: 
   A piece of thick paper
   No 2. pencil (might need a sharpener)

All other items are provided by Perfect Package, see link above

Parents:
The experiments in this set of classes are fairly easy for young children, however, please gauge whether it is appropriate for an adult to be present in case the child has difficulty. Sometimes in the group setting, an individual child can feel overwhelmed with simple problems and miss out on a successful experience. I leave it to you as parent to gauge the child's capability to complete the experiments successfully.