So I've been playing with Hot Wheels lately, and this developed as kind of a side project to something else I was working on. I've built a couple of other engines based on other designs I've found here on instructables but this one for me takes the cake! Originally I didn't intend for it to actually work, but I thought I could at least give it a try. And guess what? IT WORKS!!!Here are two other instructables that helped inspire this one- the first is not a wobbler but very simple to build…
DIY Smart Plant Pot
DIY Smart Plant pot - Tells you when the plant is thirsty
How To Convert A Chest Freezer To A Refrigerator To Save TONS Of Energy - The originator of this project got his fridge to use less than .1kW/hr, turning on for only a few minutes a day!