Candy Cane Sled and Zipline STEM Challenge for Kids

You build two candy cane vehicles: a craft-stick sled that races down a book-propped ramp, and a straw-and-string zipline with a paper-cup gondola that carries a mini candy cane. You time every run with a phone timer, compare sled against zipline, and test heavier and lighter loads to find the fastest design.

• Age: 5 and up to build with a grown-up; 7 and up to build solo
• Time: 30 to 45 minutes
• Mess level: low; sticky fingers only if a candy cane breaks

What Do You Need to Build Both Vehicles?

Gather everything before you start:

• 20 to 24 craft sticks (popsicle sticks; enough for two sleds plus guard rails)
• Masking tape or clear tape
• String, about 6 feet long
• Scissors
• 2 full-size candy canes
• 3 mini candy canes
• 1 plastic drinking straw
• 1 small paper cup
• 1 smooth board or cookie sheet for the ramp
• Stack of sturdy books
• Phone timer or stopwatch
• Paper and pencil
• 2 sturdy chairs
• Ruler or measuring tape (optional)
• Small bowl for spare candy canes
• Paper towels

How Do Kids Build the Candy Cane Sled?

1. Lay 7 craft sticks side by side on the table to form the deck.
2. Lay 2 craft sticks across the deck near each end, running the short way, and tape them down. These crossbars hold the deck together.
3. Tape a short loop of string to the front crossbar. Use it as a handle to pull the sled back up the ramp between races.
4. Tape 1 full-size candy cane across the deck as the passenger. Tape both ends so the passenger cannot slide off mid-race.

How Do Kids Build the Candy Cane Zipline?

A grown-up ties both knots. Thread the straw before you tie the second end, or you will thread nothing.

1. Tie one end of the string to the back of a sturdy chair, about 3 feet off the ground.
2. Thread the plastic straw onto the loose end of the string.
3. Tape the small paper cup under the straw. This cup is the gondola.
4. Set 1 mini candy cane in the cup. Tape it down if it tips.
5. Tie the loose end of the string to the second chair, about 2 feet off the ground, so the line slopes down from the first chair. Pull the string tight before you knot it.
6. Slide the gondola to the high end, let go, and watch it ride.

How Do You Race and Test Both Designs?

1. Prop one end of the board on the book stack to make the ramp. Mark a start line near the top with a small piece of tape.
2. Set the sled at the start line and let go without pushing. Time the run to the bottom with the phone timer. Race 3 times and write each time on the paper.
3. Change one thing: stack one more book under the ramp for a steeper slope, or tape guard rails along the deck edges. Race 3 more times and compare the times.
4. For the zipline, release the gondola from the high end and time the ride to the low end. Then test a heavier load: ride 2 mini candy canes instead of 1. Write both times down.
5. Crown a champion: compare your fastest sled time against your fastest zipline time.

What Do You Do When a Design Fails?

Engineers expect failures. Each one teaches a fix:

• Sled veers off the board: tape a craft-stick guard rail along each long edge of the deck. Rails keep the sled running straight down the ramp.
• Zipline stalls halfway: the string is too slack. Untie the low end, pull the string tighter, raise the high end a few inches, and knot it again. A tight, sloped line lets gravity pull the gondola through.
• Gondola barely moves: the load is too heavy. Swap any full-size cane for a mini candy cane. Lighter loads slide faster.
• Candy cane falls out mid-race: tape the passenger down before the next run, on the sled deck and in the gondola cup.
• Straw sticks on the string: check the string for fuzz or knots, and use a smooth plastic straw with no bends.

How Do You Keep the Challenge Safe?

A grown-up ties both zipline knots, and nobody climbs on chairs to reach higher. Check every candy cane for cracks before racing: a snapped cane leaves sharp ends, so toss cracked canes in the trash and do not eat broken pieces. Mini candy canes are a choking hazard, so toddlers watch from outside the build zone. Keep the string away from necks and cut only the length you need.

How Do You Stretch This Into a Second Round?

Build a second sled with a narrower deck and race deck widths head to head. Raise the zipline high end in 3-inch steps, time each height, and spot the pattern on your paper. Put leftover craft sticks to work as popsicle-stick Christmas tree ornaments. Loved ramp racing? Try the pumpkin rolling ramp test. For another candy cane project, make a cotton-ball candy cane collage.

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Frequently Asked Questions

What age can build these?

Kids 5 and up build both vehicles with a grown-up partner, and kids 7 and up can build solo once an adult ties the zipline knots. Younger kids make excellent race officials: they can run the phone timer, record times on the paper, and call the winner at the finish line. Keep toddlers away from the small parts.

How messy is this challenge?

Very low. No paint, no glue, no liquids. The only mess risk is a snapped candy cane, which leaves sticky shards. Check each cane for cracks before you race, keep spares in the small bowl, and wipe sticky fingers with a damp paper towel. The tape leaves no marks on the board or chairs.

How long does it take?

Plan 30 to 45 minutes. Each vehicle takes 10 to 15 minutes to build, and the races plus retests fill the rest. If you only have 20 minutes, build the sled alone and run the time trials. The zipline keeps well for a second session: leave the string tied between the chairs and race again tomorrow.

Is this safe for younger siblings?

Toddlers should watch, not build. Mini candy canes are a choking hazard, and the string must stay away from little necks. Set the race zone on the floor with a clear boundary, keep spare canes in the bowl out of reach, and have a grown-up tie all the high knots. Older kids can narrate the race for a toddler audience.

This challenge is part of our Christmas Craft Pack collection of holiday ideas. Sign up for our newsletter and we will send you new seasonal activities as we publish them.

Be safe and have fun!