I used two of the included colors for a presentation and both were to pale for participants to even see. I abandoned the use of the whiteboard and gave the markers away to a participant who said her kids could use them for drawing.
Upon walking in two sales people offered help. They escorted me to the isles where my items could be found. They studied my school list and helped me pick out the exact items requested by the school. My whole shopping experience was not only pleasant but successful.