(Try giving them a variety of tools, magnifying glass, magnet, prism, stethoscope, etc. to see which help find the worm.)
(a variety of tools; magnifying; glass, magnet, prism, stethoscope, etc.; to see which help find the worm)
a variety of tools
magnifying
glass, magnet, prism, stethoscope, etc. to see which help find the worm