Low Calorie Friday Treat

So here's how this started:
A few years ago, I brought cookies for my students on a Friday. Not just because it was Friday, there was a valid educational reason. Something do do with testing variables.
Controlled Variable: Oreo type sandwich cookie top and bottom
Manipulated Variable: Creme filling in chocolate, vanilla and mint
Responding Variable: Number of students who chose each cookie type
But the facade was transparent and easy to push aside. I knew it. They knew it. It was Friday and I thought a treat was in order.

So a few weeks later, on a treat-less Friday, the students begged for a Friday treat. I said, um, ok. But that I didn't have any high calorie treats so it would have to be a low calorie treat. Then I dug around on my hard drive and found this sound clip.

They loved it, so the tradition began.

• movie clips
• audio clips
• funny cartoons
• weird stories
• once we figured out our secret code names with the Name Change-o-Chart 2000
  

But the tradition has morphed and now I try to find something "educational". Here's one from a couple of weeks ago when we were studying energy transfers:

But this week we are talking about the nature of light. Does it move as particles or waves?? I couldn't find anything to give them. So after we cleaned up after the lab. SUPER MESSY today; we had to get the mop out and everything. I played some Queen for them and we practiced our air guitar.

It's become a fun tradition for me and the scholars entrusted into my care. I even sometimes have former students stopping by my classroom on Fridays to get treats. But I need some multimedia resources. If you, or anyone you can think of has any thoughts, ideas or favorite clips, please let me know.

I'm excited to hear your suggestions--don't disappoint the kids!

Love, Loopy Wafflesniffer