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.

This site is a compilation of OER sites. You can also add to it as well.
http://edtechpost.wikispaces.com/OER+Dynamic+Search+Engine

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.