Tell us about yourself!
You could use a collar, but I would probably just tie a rope halter like this one: https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjb28LfxIjPAhWF0iYKHeKDDu0QjRwIBw&url=http%3A%2F%2Fwww.wikihow.com%2FMake-an-Adjustable-Rope-Halter&psig=AFQjCNE9vDbOHzEAGDxdzrXxgxTMNnvNFQ&ust=1473725307586871. Even if your sheep is not "halter broke", they are not very large animals, and should not make trouble for you.
aquaponic BALCONY GARDEN
Mini seedling greenhouse
Arduino 101 Fundamentals
Convert Your Old Laptop Battery Into a Power Bank
Solar Water Heater: Part 1- The Collector
Scout Project: Campfire Cakes (Cakes cooked in an orange)
Window Mounted Solar Hot Air Furnace (Aluminum Soffit Based)
Extreme creek fishing
Repurposed Etched Glass Spice Jars...
Homemade arduino printer
Reaction Time Tester
Lard Lamp - a solid fat burner made by lost wax casting
Tiffin Box from Tuna Cans
How To Build Your Own Strawberry Tower
The Cheapest Way to Play RockBand With REAL Drums
Scented Bath Salts
Make pizza with a plasma cutter, a backhoe and a pile of mud!
Build a Microwave Transformer Homemade Stick/Arc Welder
Build A Bicycle Ramp
Make Your Own Hauler/Pot Lifter (15 mins; $3)
Drink Can Tinwork
I2C Bus for ATtiny and ATmega
The Arduino Weather Station / Thermostat
Carnivorous Plant Terrarium
Almost Free Solar Hot Air Collector
My Improvised DC Generator Build
How to Make Tofu
Make a Wooden Soma Cube
Make an iPod Speaker from a Hallmark Music Card
Magnetic Family Chore Chart (for a multi-child house hold)
How to Make Great Fresh Mozzarella Cheese
Make an all purpose organic pesticide from vegetables
Pringles Wind Turbine (Pleech) - Version One
Stainless Steel Garden Incinerator - Patio Heater from recycled scrap.
Make your own sketch journal with holders
Solar Lawn Mower!
Make a fake rock cave/basking spot for a reptile cage.
Elephant-Shaped Piggy Bank
Easy to build, easy to use, water bottle launcher!
Knife Sharpening Tricks
How To: Make Bath Bombs
Screen Printing: Cheap, Dirty, and At Home
How I built a carbon bike frame at home (and a bamboo frame too)
A house for the toads
Make your own Lathe from other peoples rubbish
A Word Clock
Bamboo Bike Frame.
Home Build Solar System
LED Replacement Fluorescent Tube
Rubber Hose Chair
DIY Digital Thermometer
An Improved Raised Bed Garden
Chispito Wind Generator
PVC FRUIT PICKER
Bike Trailer -- tough and light
Tater Totes: Potato grow bags
Used Tired Raised Garden & Tree Ring
Easy Savings - Run your Dryer on Free Energy
7 Foot Axial Flux Wind Turbine
Successful Container Gardening
D.I.Y. Solar Setup.
Make Paper That Grows - Recycle, Renew, and Plant It In The Ground
Press Aluminum Cans into Ceiling and Wall Tiles
Flashlight Without Batteries--from the book, "Haywired"
How To Create a Rechargable LED Flashlight
Cool Little Miniature Stove!
Grow organic food without spending $
Using AC with LEDs (Part 4) - The New Technologies
Making a Soil Blocker
How to Grow Pineapples
Greenhouse From Old Windows
Solar Powered Cell Phone Charger
Homebuilt Generator (Riding Lawn Mower) 1Kw
Building a Honey Extractor (using an 'antique' washing machine)
Get More from Your Circular Saw
Garduino: Gardening + Arduino
Shake it like a Tic-Tac!
PVC Air Cannon
How to make a cardboard costume helmet
How to make your own LED lightbulbs
Worm bin bag for indoor vermicomposting and easy separation of worms from compost
Retrofitting LEDs in a Dynamo Bulb