You have the amazing triangular ferbies for your kindergartner, the color giants for your third grader and the regular sized pencils and color pencils for your seventh grader. Now for the sharpener.
Here is an affordable option which works for all three types of pencil. This dual sharpener is perfect for even the larger Stockmar, Mercurius, Yorik and Lyra colored pencils (hexagonal and triangular) up to 0.39 inch (10 mm) in diameter and for the regular sized rounded pencils too.
Comes in four bright colors: blue, red, yellow and green. Replacement blades are also available.
Go here for all available Pencil Sharpeners
⚠️ WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.