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Subjects
Math, Social Studies, Science, Environmental Awareness
Grade
K-4
Brief Description
Students will enjoy recycling empty Elmer’s® Glue Sticks to reinforce the concepts of reduce, reuse, and recycle. This fun activity has many tie-ins to math and science, but giving children an opportunity to create their own crayons will be the focus.
Objectives
Students will:
Keywords
Reduce, reuse, recycle, changing states of matter
Materials Needed
NOTE: This activity requires melting crayons with a heating element. Be sure to supervise students around the heating element.
Lesson Plan
Kick off the activity with by introducing the concepts of reduce, reuse and recycle to your students. A great picture book to share is Eileen Green the Recycling Queen by Penelope Dyan. There are many other great picture books to use as a springboard for discussion (see Extending the Lesson below). After reading the book aloud to students, discuss the difference between recycling, reusing and reducing what we consume. Explain that we can reduce the amount of products we consume by reusing things in new or different ways.
Engage students in a discussion about things that we might throw away but that we could also reuse and/or recycle to reduce what we consume. Ask students if they can think of any way to reuse a tub of old crayons. Explain that they can recycle the crayons and create new ones by melting them down and pouring them into empty Elmer’s Glue Sticks.
Instruct students to rinse out the glue sticks. Make sure they do not damage the stem inside the glue stick. Place the clean glue sticks on paper towels to dry completely. (If you still have the small plastic piece inside the glue stick, you’ll be able to use that to twist the recycled crayon up and down. If not, you can still create the crayons.)
Next, allow students to sort the old crayons by placing the pieces into groups according to colors. Instruct the students to peel the labels off of the crayons. As the students are preparing the crayons, heat some water in a pan so that you can melt the old crayons. (A shallow pan works best, as it allows students to observe the changes in the water and the steam. This also keeps the salad dressing bottles from getting too hot for the students to handle.) The water doesn’t have to boil to melt the crayons. Low heat for approximately 15 minutes will melt the crayons to a liquid state, and the glass bottles will not be too hot for students to handle if you want to let them pour the wax into the glue sticks.
As the water is heating, discuss states of matter. Explain that water is a liquid, crayons are solids, and the steam they see from the heated water is a gas. Ask them to predict what will happen to the crayons when the heat is applied. Ask them what they think will happen when the melted wax cools again.
Let the students place crayon pieces into the salad dressing bottles according to colors. You can create multi-colored crayons by pouring different-colored wax into the glue stick, but each bottle should contain the same (or nearly the same) color crayon pieces.
Pour the melted crayon wax carefully into the empty glue stick containers. NOTE: Instruct students not to twist the bottom of the glue stick until the wax has completely hardened. Once the wax is cool and hard, you can twist the bottom, and your new crayons will be ready to use.
Extend the Lesson
Literature Connections:
Assessment
Provide time for students to create a picture with their recycled crayons to demonstrate the meaning of reuse, reduce and recycle. Ask them to create a poster that demonstrates why it is important to consider our environment before we discard items that might otherwise be reused or recycled.
Lesson Plan Source
Cre8time, through partnership with EducationWorld
Submitted By
National Standards
SCIENCE
GRADES K - 4
NS.K-4.2 Physical Science
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