Egg Tempera

I was given a huge box of Pelikan tempera paints. It is filled with hundreds of tubes with at least 60 different colors, all still in their original boxes. I would like to find a good use for them in a permanent, durable way. Are there any egg tempera recipes or other ideas that would let me take advantage of this bounty? I also would like some advice on surfaces for egg tempera, techniques and any mediums that I could use.

Thank you,
Lenny