Spent the holiday weekend chilling with friends, and we built a few Jitterbugs (tiny, super-simple, super-cheap robots that run away from light, cockroach-style). I’d totally forgotten how much fun these are. Here’s a video of my 4-year-old sitting in the closet with flashlights and competing at “reverse sumo” (first person out of the ring wins):
Here’s a set of Jitterbugs built by Stephen Trouvere and his boys, with the addition of LED eyes:
I love how those lil guys turned out! For the curious, all we’ve done is built the standard jitterbug, then taken a pair of regular ol’ red LEDs, wired them in parallel, buffered the positive lead with a 100Ω resistor (brown-black-brown stripes), and soldered the free resistor lead to the positive battery terminal, and the negative LED legs to the negative terminal (it’s the same way we wire up the LEDs in the “Switchbox” project in that same book).
My son has been at “Rocks & Robots” camp this week (mostly building
sumo-wrestling robots with Mindstorms, plus two half-days of rock climbing), and apparently he and several other kids have developed a species of spoken-word text-based adventure that they play over lunch, called “Dungeon!!!”The game starts with someone saying something along the lines of “You are in a cage hanging from a rusted chain, and realize the cage door is not actually locked. What do you do?” Whoever else is sitting around is in the party and starts asking questions and making decisions. No gold, no XP, no dice, no pencil, no paper—just you and the Dungeon.
He sticks his finger in his mouth, then draws the spit-slick digit out and, swift as a fencer, pushes it into my face. I instinctively rear back, as though moved by some sort of mystical energy field, perhaps one created by all living things—the sorta thing that surrounds us, penetrates us, and binds the galaxy together.