One wiggly paper caterpillar is fun. Three of them — in yellow, green, and orange, each with its own sweet little face — lined up together and blown through their straws one after another is an entirely different level of delight. This is the same beloved accordion-fold-and-blow technique, built out into a full rainbow set that turns a quiet afternoon into a mini caterpillar parade.
The core trick stays the same: a strip of colored paper folded into a tight accordion pleat, trimmed along the edges into soft rounded scallops so each segment reads as a plump caterpillar bump, then taped to a straw at an internal fold point so a gentle puff of air makes it ripple and wiggle. What makes this version special is doing it three times in three different colors, giving each one its own tiny personality through subtle differences in the face and spot pattern — a shy yellow one, a confident green one, and a cheeky orange one.
This is a wonderful group or classroom project — each caterpillar takes about ten minutes once you’ve got the folding rhythm down, and kids love racing their finished ones against each other. Ages six and up can fold independently, with an adult helping position each straw. Perfect for a rainy day, a birthday party craft table, or just building an entire wiggly little zoo.
What You’ll Need
Materials:
- Paper strips in three colors — yellow, green, and orange — each approximately 5cm wide x 30cm long (construction paper or cardstock)
- Three drinking straws
- Clear tape
- Fine-tip black marker (for faces)
- Pink marker (for cheek blush, optional)
Tools:
- Scissors
- Ruler and pencil (for marking even fold widths)
Before You Start — Essential Notes
Fold one caterpillar completely before starting the next. Trying to fold all three strips at once leads to mixed-up pieces and uneven creases. Finish the full process — fold, trim, unfold, face, straw — for one color before moving to the next.
Keep fold width identical across all three. For the trio to move and look consistent as a matched set, use the same measured fold width (roughly 2.5cm) on every single strip, regardless of color.
Vary the face slightly for personality. Give each caterpillar a subtly different expression — wide open eyes for one, sleepy half-closed eyes for another, a big open smile for the third — so the trio feels like three distinct little characters rather than three copies.
Test each straw placement individually. Every strip may compress slightly differently depending on how tightly it was folded, so test the wiggle motion on each caterpillar separately before taping the straw permanently.
Step-by-Step Instructions
Step 1 — Cut Three Paper Strips
Cut three long strips, one in yellow, one in green, and one in orange, each approximately 5cm wide and 30cm long, using sharp scissors on a full sheet of construction paper for each color.
Step 2 — Fold the First Strip into Even Sections
Take the green strip and fold it in half, then in half again, creasing firmly each time, until you have four to five even vertical sections marked with crisp fold lines.
Step 3 — Accordion Fold the Strip
Starting from one end, fold the strip backward and forward in a tight, even zigzag pattern using your pre-marked fold lines as a guide, continuing all the way to the end.
Step 4 — Trim the Scalloped Edges
With the strip still fully folded and stacked, trim one long edge into a soft rounded curve, cutting through all the layers at once so every segment gets a matching scalloped bump. Repeat on the opposite edge.
Step 5 — Round the End Corners
Trim the two end corners of the folded stack into soft rounded points instead of sharp square corners, so the head and tail ends look gently rounded once unfolded.
Step 6 — Unfold Into the Segmented Body
Gently pull the accordion strip open into its full zigzag shape, letting the rounded scalloped segments fan out into the classic caterpillar body form.
Step 7 — Draw the Face and Straw-Test
On the front segment, draw two round eyes and a curved smile with a fine-tip black marker, then repeat Steps 1 through 7 for the yellow and orange strips, giving each caterpillar its own slightly different expression — wide-eyed, sleepy, or big-smiling.
Step 8 — Attach a Straw to Each Caterpillar
For each caterpillar, tape a drinking straw securely to the underside of an internal fold point roughly a third of the way along the body, positioned so a gentle puff of air ripples motion through the connected segments.
Fun Variations to Try
Caterpillar race track: Draw a simple curved “path” on a large sheet of paper and let each caterpillar “race” across it as everyone blows through their straws at the same time.
Extra-long strip trio: Use longer strips for a set of extra-long, extra-dramatic wiggling caterpillars with more visible segments.
Name tag caterpillars: Write a different letter or name on each caterpillar’s front segment for a personalized trio, perfect for siblings or classmates.
Butterfly evolution set: Pair the finished trio with three small paper cocoons and three paper butterflies in matching colors for a colorful life-cycle display.
Googly-eyed upgrade: Glue small googly eyes onto each caterpillar’s front segment instead of drawn eyes for extra dimensional charm across the whole set.
Tips for Best Results
Keep every strip’s fold width consistent across all three colors — this is what makes the trio feel like a matched, coordinated set rather than three random caterpillars.
Trim the scallop curves slowly on each folded stack — cutting through several layers at once means a rushed snip affects every segment on that caterpillar.
Let each caterpillar dry fully (if any glue was used on the backing) before testing the straw and wiggle motion, so nothing shifts out of shape.
Display and Gift Ideas
Line up the finished trio along a windowsill or shelf for a cheerful, colorful little display that visitors will want to pick up and blow through themselves.
Package the three together with their straws as a rainbow caterpillar gift set for a young sibling or classmate — an inexpensive, genuinely fun handmade present.
Use them as a table centerpiece activity at a kids’ party — guests take turns blowing through each straw and watching their favorite color wiggle across the table.
Final Thoughts
This rainbow caterpillar trio proves that a craft you already love can become even more fun simply by making a few, each with its own tiny personality — the same folding technique, three times the color, three times the charm.
Fold one. Trim it. Give it a face. Repeat twice more in different colors. Then line them all up, hand out the straws, and let the wiggling race begin.