Build a Zipline That Plays Tones
Build a safe tabletop zipline with a glider that rings different bells or strikes tuned metal strips, exploring sound pitch and simple engineering.
About this activity
Build a safe tabletop zipline with a glider that rings different bells or strikes tuned metal strips, exploring sound pitch and simple engineering.
What you need
Step by step
- 1
Step 1
Gather all Materials Needed and bring them to the table so everything is ready to work with.
- 2
Step 2
Place the two chairs or stacks of books on opposite sides of a table about one meter apart to act as the zipline supports.
- 3
Step 3
Tie one end of the string securely to the top of one support at about table-height so it will be the higher end of the zipline.
- 4
Step 4
Thread the straw onto the string so the straw can slide along the line and become your glider sleeve.
- 5
Step 5
Tie the other end of the string to the second support making the line slant gently downward toward the lower support so the glider can roll downhill.
- 6
Step 6
Make a stopper at the lower end by tying a big knot or looping extra tape around the string so the straw cannot slide off the end.
- 7
Step 7
Tape the wooden craft stick to the straw so the stick points down below the straw and will act like a striker or arm.
- 8
Step 8
Use paper clips or safety pins to hang 3 different bells or metal objects along the zipline path where the stick will pass by each one.
- 9
Step 9
Measure and space the hanging bells with the ruler so each bell is a little farther along the line than the last one.
- 10
Step 10
Release the straw glider from the top and watch the stick hit the bells; observe which bells ring and how they sound.
- 11
Step 11
Move one bell slightly closer or farther from the path if the stick misses or just grazes it to make a clear tone.
- 12
Step 12
Try swapping a bell for a larger or smaller metal object to hear a higher or lower pitch and note which sounds higher and which sound lower.
- 13
Step 13
Share a photo or description of your finished zipline that plays tones on DIY.org so others can see and try your idea.
Fun facts
How do you build a tabletop zipline that plays tones?
Set up a slightly sloped line between two stable supports (chairs, books, or dowels). Make a lightweight glider from a clothespin or small cardboard/foam block that clips onto the line. Attach small strikers or a row of hanging bells/metal strips so the glider hits them as it travels. Adjust line tension and slope to control speed, and move striker positions or strip lengths to change the pitches. Test and tweak with an adult supervising cutting or screwing.
What materials do I need to build a tone-playing tabletop zipline?
You’ll need sturdy string or fishing line, two supports (chairs, dowels, or heavy books), a lightweight glider (clothespin, foam, or cardboard), small bells or thin metal strips cut to different lengths, tape or hot glue, scissors and pliers, eye screws or a nail for anchoring, and optional rubber bands or beads. Have adult tools ready for safe cutting and fastening, plus a ruler to measure strip lengths for tuning.
What ages is this zipline activity suitable for?
This activity suits children about 6 and up with adult help; ages 8–12 can do most steps independently with supervision. Younger kids (4–5) can join using pre-cut parts and help place bells or test the glider. Teens can experiment with tuning and physics. Always supervise tool use, ensure small parts are kept away from toddlers, and tailor complexity to the child’s skills and attention span.
What safety tips and variations should I know for the tone zipline?
Safety: supervise cutting, gluing, and anchoring; wear goggles when cutting metal; secure supports and test line tension before play; avoid small loose parts around toddlers. Variations: add multiple gliders for races, arrange metal strips to form a simple scale, change glider weight to alter pitch/contact force, or build a longer line outdoors. Encourage experimentation to explore pitch, speed, and simple engineering.
Watch & Learn
Need help?
What can I use instead of small bells if I can't find any?
If you can't find small bells for step 11, hang metal keys, bottle caps, spoons, or nuts-and-bolts with paper clips or safety pins so the wooden craft stick taped to the straw (step 8) can still strike them and make tones.
The straw glider keeps snagging or the stick misses the bells—how do I fix that?
If the straw glider snags or the stick misses the bells (steps 4, 8, 11), tighten and straighten the string or replace it with fishing line to remove sag, make a bigger stopper at the lower end with extra tape or a knot (step 6), and move each bell slightly with the ruler (step 10) until the taped craft stick reliably strikes them.
How can I adapt this zipline activity for younger kids or older kids?
For preschoolers, shorten the distance between supports and pre-thread the straw and attach a large, soft object instead of a craft stick (steps 2–4, 8) with adult supervision, while older kids can precisely measure spacing with the ruler (step 10), experiment with different metal sizes to study pitch (step 12), and document results.
What are easy ways to extend or personalize the tone-playing zipline?
To extend the project, add more hanging metal objects and use the ruler (step 10) to space them for rhythmic patterns, swap sizes to tune pitches (step 12), decorate the straw and craft stick (step 8), and post a photo or explanation of your design on DIY.org (step 13).