I compiled many flash cards and art for teaching elementary school English in Japan. Many files are Creative Commons licensed (if written in the file itself) or in the public domain (see the COPYING file), so you can modify them and redistribute them, if you like.

The flash cards cover many topics: days of the week, months, weather, fruit, emotions, family members, greetings, pizza, school rooms, buildings, vehicles, and more. For each topic, there are A4 flash cards and karuta cards. You probably want the PDFs. If you want to edit the files, download the original images or the odg files. You can edit Open Document Graphics (odg) and Open Document Text (odt) files with OpenOffice, among other programs. OpenOffice is free. See also Clker, PD Clipart, and Wikimedia Commons.

I find it disgusting that I can't include mp3s of The Beatles' "Hello Goodbye" or Eric Clapton's "Willie and the Hand Jive" on my website. These 40-year-old songs that I can use in my classroom, that I think you should use in yours, they are part of our history. They are part of our culture, but they're locked away from us, and for no good reason.