Where Do Bike Tires Start?

Why

Where do your bike tires start? Create a realistic scene to show how rubber tappers in Brazil gather latex in huge rain forests.

Steps

1. Discover latex! In the late 1800s, Brazilians discovered how to extract sap (latex) from rubber trees by cutting the bark. The latex is thickened by passing it through smoke and creating a ball of rubber. It can also be thickened by mixing it with the sap of the ofé tree and pressing it into a wooden box to create a rubber block. Find out more about this fascinating process. Then create a triarama to show how trees are tapped—the first step toward making your bike tires.

2. Cut your triarama. With Crayola® Scissors, cut a recycled file folder into a square. Fold it in half, point to point. Open and fold it in half the other way, point to point. Cut one of these folds to the center of your square. One of the sections along the cut edge will be the floor of your triarama. The other will fold beneath it.

3. Grow a rainforest. Color a rain forest background and floor with Crayola Twistables. Most rainforests are dense with green plants and drip with rain. Overlap the two bottom flaps. With Crayola School Glue, glue them together. Air-dry the triarama.

4. Use Crayola Model Magic to shape rubber trees, a cup, a large bowl, a rubber block, and ball. To color the Model Magic, rub in color from a Crayola Washable Marker and knead. Make realistic-looking slashes in the sides of your trees with a craft stick.

5. Use toothpicks for the legs of the bowl and the rod holding the rubber ball. Glue all pieces into place. Air-dry before displaying.

Safety Guidelines

Adult supervision is required for any arts & crafts project. Observe children closely and intervene as necessary to prevent potential safety problems and ensure appropriate use of arts and crafts materials. Some craft items, particularly beads and buttons, are potential choking hazards for young children. Avoid use of such small parts with children younger than 3 years. Craft items such as scissors, push pins and chenille sticks may have sharp points or edges. Avoid use of materials with sharp points by children younger than 4 years. Read all manufacturers' safety warnings before using arts and craft supplies.

Crayola Modeling Materials including Crayola Model Magic®, and Model Magic Fusion™, Crayola Air-Dry Clay, and Crayola Dough—

  • Keep away from open flames. Do not use to make candleholders, hot plates, trivets, or other similar objects that will be used or placed near fire and other heat sources.
  • Do not put in an oven, microwave, or kiln.
  • Do not make into vessels/containers that will hold unpackaged food.
  • The use of modeling material to make items that look like food is discouraged for children younger than age 5 to avoid their confusion with real food.
  • Unless sealed with a water-resistant glaze, do not make projects exposed to or immersed in water, such as boats or outdoor bird feeders. They would disintegrate when exposed to moisture.
  • Crayola Dough—contains gluten (wheat flour) as an ingredient.
  • Crayola Air-Dry Clay, Crayola Model Magic and Model Magic Fusion are gluten-free. However, they are produced on the same machinery as Crayola Dough which does contain gluten. Although the machines are cleaned prior to the start of each production run, there is a slight possibility that trace amounts of gluten from Crayola Dough may be present in the other modeling compound products. For information regarding specific ingredients or allergic concerns, please call our Consumer Affairs department at 1-800-272-9652 weekdays between 9 AM and 4 PM Eastern Standard Time.

Scissors—ATTENTION: The cutting edges of scissors are sharp and care should be taken whenever cutting or handling. Blunt-tip scissors should be used only by children 4 years and older. Pointed-tip scissors should be used only by children 6 years and older.

Wood—By its nature, wood is rough and may contain splinters or sharp points

Related Crafts

Crafts

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Supplies

crayola supplies
  • Markers
  • Model Magic®
  • Twistables®
  • No-Run School Glue
  • Blunt-Tip Scissors
household supplies
  • toothpicks - wooden
  • craft sticks
  • recycled file folders

Where & When

"This was a great science project for my son. He could really relate to the bicycle tire connection."
Jose M., father of 9-year-old.

"My children studied rainforests for several weeks. They found rubber tappers (seringueiro) especially interesting."
Monica S., home-school parent of ages 7 and 10.


Interesting Info

Do you know how rubber got its name? During the 1700s an English chemist named Joseph Priestley found out that dry rubber sap could be used to rub out pencil marks.