There are a lot of resources on this site that are available for teaching about the holocaust. You can even request some free videos to be sent to you.
There are many tools on this site to use. You can also create things to add to the site. You can search by subject. Many, many resources. https://www.oercommons.org/
At the White House Maker Faire recently, where President Obama invited "makers" of all ages to display their creations, the President investigated a robotic giraffe, a red weather balloon and shot a marshmallow cannon made by a student.