Materials Needed: 

• Empty paper towel roll

• Craft knife and/or scissors

• Blank or old CD

• Pencil

• Small piece of cardboard or cardstock

• Tape

• Paint (optional)

  
  

Steps: 

1. If you’ll be painting your paper towel roll, you’ll want to do that first and let it dry. (This step isn’t necessary, but it’s hard for us to pass up an opportunity to paint something!)

2. Use a craft knife to cut a thin slit at a 45° angle toward the bottom of the cardboard tube.

3. Directly across from the slit, make a small peephole or viewing hole using your craft knife.

4. Trace one end of your paper towel roll onto your small scrap of cardboard or cardstock. Cut it out.

5. Cut a straight slit right across the center of your cardboard circle.

6. Tape the circle to the top of your spectroscope.

7. Insert the CD into your 45° angled slit with the shiny side facing up.

8. Start by taking your spectroscope outside. Point the top slit up at the sky (NOT directly at the sun). Look through the peephole. You will see a rainbow inside!
   

If you have any more questions, feel free to DM us.