It is easy to take apart for quick needle replacing.
This three-dimensional puzzle includes various geometric shapes and textures for toddlers to take apart and put back together again.
Most electronics supply stores carry them, but you can also take apart old remote controls and pull out the one or two LEDs at the end of the remote.
At least once a year, you should take apart the cooking area of your grill to thoroughly clean each component.
The ISMCS has an excellent article on how to take apart the machine, clean it, and reassemble it.
