Tin-Can Dog Robot
Making this tin can dog is a perfect project for you and your kids to do together. Almost everything you need can be found in your tool chest, kitchen cabinet, and recycling bin. Use a smooth-edge can opener to prevent any injuries, or rub jagged edges with emery paper prior to assembly.
- Large can (such as one that held crushed or whole tomatoes)
- Small can (such as one that held kidney beans)
- Smooth-edge can opener
- Drill, with 3/16-inch drill bit
- No. 8 bolt with nut
- Extension spring
- 4 small casters
- Liquid Nails adhesive
- Heavy-duty peel-and-stick Velcro
- Emery paper
- Two 1/2-inch cable straps
- Bolts, washers, and wing nuts
- Metallic scouring pad
- Pipe clamp
- Large flat magnet
- Red horseshoe magnet
Open one end of each can with a smooth-edge can opener. Use the larger can for the body, the smaller for the head. For the tail, drill two small holes near the open end of the large can; insert a bolt through the hole and fasten with a nut. Slide the extension spring over the bolt, and secure it through the second hole by hooking it from the inside out.
For the legs: Glue the wheels of the casters in place with adhesive, so they don't swivel; attach to the underside of the body with Velcro.
For the ears: Drill two holes halfway up the side of the small can, about 1 1/2 inches apart. Smooth the edges with the emery paper. Affix a cable strap at each hole using a bolt, a washer, and a wing nut, which is fastened inside the can. The bolts that secure the ears will be the eyes. Use a rubber washer over the aluminum one to give the dog a "spot" around one of the eyes.
Drill a hole in the small can opposite the eyes and a corresponding hole in the tail-side of the large can. Place a pipe clamp around a scouring pad to create a neck with a collar. Attach the head to the body with a long bolt and wing nut: Insert the bolt from inside the small can, through the scouring pad and clamp, and into the larger can; secure with the wing nut.
Use the flat magnet for the nose and the horseshoe for the tongue.