|blue is negative, black is positive|
For our one hour holiday card decorating program, I gave each student 3 LEDs. I had extra binder clips, batteries, (you only get 2 of each in the kit) and copper tape on hand. Unfortunately the effects stickers, which allowed the lights to blink, I ordered only came with 4 stickers for $19.99 so I kept them for a later time.
Like sewing, the circuit design is crucial. If I could go back and do this project over I wouldn't have put so much space between the positive LED branches and negative tape connecting to the slide. I also found that my positioning of the battery was all wrong. It would have been better on the top left so I could attach it to the corner of blue paper. I also tried overlaying another piece of paper between the tree and the lights but it was harder to get the lights to turn on. My first attempt is not the prettiest, but it does light up! (much more successful than the Mother's Day card hooray!).
With a stand alone program like this, you never know the level of the kids coming into the workshop. The 4th and 5th graders had difficulty with circuit design so I started by getting them to artistically design their card first, then circuitry but when it came to the circuitry they didn't want to follow along with the templates I had printed for them. Everyone wanted to design their own unique circuit which poses a bigger challenge to the instructor to figure out individual designs. It's also hard to tell students go ahead test away when you know how much the supplies cost.
That's the trouble with tinkering. Sometimes kids do need more one to one help and they don't like experimenting with failed outcomes. Next time everyone just does one simple LED circuit together to understand the concepts and then design their own later (which sounds like it would need an extra half an hour to the program). I should have used the tutorial videos from the chibi website with iPads on hand to supplement questions.
One crucial thing in card making is that the tape needs to be free of creases so pressing your finger down over the entire circuit will help conduct the electricity. I fixed 2 students who were ready to give up their cards that way.