Back Rub Machine
If your back aches and you do not want to pay for a back rub, I got a solution. You can make a motor controlled back rub machine.
Supplies
uxcell DC 3V 30RPM Torque Geared Gearbox Gear Box Micro Electric Motor, a wheel that fits on to it, 3v battery, 3v battery holder, switch, wires, foam, soldering machine, glue gun, and 3 inch wide pvc pipe.
Solder and Glue It
Solder the motor, battery holder, and switch together. Glue the motor inside the pvc top. Make sure that with the wheel, the motor can still turn. Drill a hole for the switch, and glue the battery upside down on the bottom of the pvc, so you can take it out and replace it if needed.
Painting It
Put a little bit of foam around the switch, and paint the pvc the color desired. Have fun with your machine.