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Sculpey III® Rainbow Mason Jar

Designed by Precious Nunez
This Rainbow Mason Jar makes a perfect decoration for your classroom, desk, or craft room. Repurpose a Mason jar with this super cute yet simple project to hold your supplies, pencils, popsicle sticks, crayons, or stickers; it’s up to your imagination!

Time to complete – Sculpting time approximately 15 minutes and approximately 30 minutes to paint
Save To Create Later
Grouped product items
Product ImageProduct Name Qty
Sculpey III® White 2 oz
Sculpey III® Blue 2 oz
Sculpey III® Yellow 2 oz
Sculpey III® Red 2 oz
Photo shows completed Sculpey III® Rainbow Mason Jar
Click image to open expanded view
Photo shows completed Sculpey III® Rainbow Mason Jar
  • Mason Jar
  • Paint brush (big and small)
  • Paint: white, pink, blue, and yellow
  • Super Glue
  • X-Acto knife

Project Instructions

    Getting Started:
Please make sure your work area is covered and you are not working on an unprotected surface. We recommend working on the Sculpey® Oven-Safe Work Mat, wax paper, metal baking sheet, or disposable foil. Uncured clay may damage unprotected furniture or finished surfaces. Be sure to cover your crafting area appropriately.

Start with clean hands, unwrap and knead clay until soft and smooth, or condition by running clay though a Pasta Machine. We recommend using a designated machine for clay purposes only. When working with multiple colors, clean hands with soap and water or baby wipes (we have found that baby wipes work best) before switching colors. Shape clay, pressing pieces firmly together. Wash hands after use.

    Baking (also called Curing):
Begin by preheating oven to 275 °F (130 °C). After you are done creating; for best results bake/cure clay on an oven-proof surface such metal, aluminum foil, an index card or the Sculpey® Clay Mat at 275°F (130 °C) for 15 minutes per 1/4" (6 mm) thickness according to package directions. Oven safe glass or ceramic surfaces are also acceptable for baking/curing; however please note that the baking/curing times may take longer as the glass or ceramic surfaces take longer to heat up. For best baking results, use an oven thermometer. DO NOT USE MICROWAVE OVEN. DO NOT EXCEED THE ABOVE TEMPERATURE OR RECOMMENDED BAKING TIME.
Roll one small ball in each color of Red, Orange, Yellow, Green, Blue, and Purple. To make these colors mix Yellow + Red = Orange, Yellow + Blue = Green, Red + Blue = Purple. You can mix small bits of white clay to lighten any color if you desire
photo shows as described
Roll out each color into a long thin snake about 3-4 inches long
photo shows snakes of color
Take the smooth side of the jar and wrap the red snake into an arch and size it according to your preference.
photo shows as described
Continue to add each color in order underneath the red arch shown on the image: Red, Orange, Yellow, Green, Blue, and Purple.
photo shows adding additional colors
After completing, trim the bottoms of the rainbow to make clean edges and slightly press the rainbow securely onto the mason jar. Bake the rainbow onto the jar according to Step 1.
photo shows rainbow ready to bake on jar
Once the rainbow is baked, pop the rainbow off and paint the jar completely. Do multiple coats to make the paint opaque and let it dry completely
photo shows painting jar
Super glue the back of the rainbow and stick it to the jar.
photo shows as described
Paint stars and sparkles around the jar to give additional details as shown.
photo shows completed rainbow jar