Take a piece of onion and peel some skin from the inside surface
step 2 to making an onion slide
cut a small square from skin
step 3 to making an onion slide
put a drop of water in the centre of a microscope slide an put the onion skin on the water drop
step 4 to making an onion slide
carefully lower a coverslip onto the onion skin
step 5 to making an onion slide
put a drop of iodine solution at one end of the coverslip and put a paper towel at the other end. The iodine will go under the coverslip and stain the onion skin.
