Creative Dad CompanyCreative Dad Company
EngineeringScience

Cardboard Car Wash

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Grades K-235-45 minSource: Creative Dad Company

Kids design a working mini car wash with brushes, rollers, and water paths, then send toy cars through to see if their engineering holds up. A wonderfully messy, hands-on engineering challenge with a satisfying finale.

Budget levels

Materials list coming soon to members

Materials links go to Amazon. Prices are estimates and may change. As an Amazon Associate, Creative Dad Company earns from qualifying purchases.

Quick Start

Digital downloads only. $0 to buy. Printing is noted separately.

Materials list coming soon.

Student time: one class period, one day.

Teacher prep / build-ahead: separate from student time.

Scale it

The default plan is one class period on a single day.

Scale back: Fit it into a shorter period, use fewer effects, or run a demo instead of a build.

Scale up: Add one extra effect, or spread the share-out across another day.

Ambiance video

Ambiance video coming soon from Creative Dad Studio

Full Experience

Up to $25 per class (class of about 30, 6 groups).

Materials list coming soon.

Student time: one day.

Teacher prep / build-ahead: separate from student time.

Scale it

The default plan is one school day.

Scale back: Fit the build into one period with fewer effects.

Scale up: Spread the work across days, or add more effects.

Total Transformation

The bigger kit, priced per class (class of about 30, 6 groups).

Materials list coming soon.

Student time: one day (one session, one-day event).

Teacher prep / build-ahead: separate from student time.

Scale it

The default plan is one session, a one-day event.

Scale back: Shorten the event, or run a demo for a smaller audience.

Scale up: Spread the build and the event across days, or invite a bigger audience.

Choose your version

Every level teaches the same core idea — pick the one that fits your time, budget, and energy today.

Student time: 30 min, one class periodTeacher prep / build-ahead: 10 min$0 to buy. Printing noted separately.One table or a small area of floor spaceBeginner-friendly

Setup

Gather cardboard box, sponges, pipe cleaners and clear a small work surface. Read the Cardboard Car Wash mission aloud, then place the supplies where children can choose and compare them safely.

Activity

  1. Look at pictures of a real car wash and discuss what brushes, rollers, and water need to do to clean a car.
  2. Build a tunnel from a cardboard box with pipe-cleaner brushes and sponge rollers taped along the sides for cars to pass through.
  3. Push a toy car through the wash and find it gets stuck on a floppy brush, then re-tape the brush at a better angle so the car glides through.
  4. Run a grand opening of the car wash for a few dirty toy cars and show family how each part gets them clean.

Ambiance video

Ambiance video coming soon from Creative Dad Studio

Done when: Children complete the core mission and a grand opening of the car wash for a few dirty toy cars and show family how each part gets them clean.

Materials

cardboard box, pipe cleaners or yarn, sponges, small toy cars, shallow water tray

Shown for the Quick Start version — switch tabs above to see what changes.

Materials links go to Amazon. Prices are estimates and may change.

As an Amazon Associate, Creative Dad Company earns from qualifying purchases.

Steps

  1. Look at pictures of a real car wash and discuss what brushes, rollers, and water need to do to clean a car.
  2. Build a tunnel from a cardboard box with pipe-cleaner brushes and sponge rollers taped along the sides for cars to pass through.
  3. Push a toy car through the wash and find it gets stuck on a floppy brush, then re-tape the brush at a better angle so the car glides through.
  4. Run a grand opening of the car wash for a few dirty toy cars and show family how each part gets them clean.

Standards mapped

  • NGSS · K-2-ETS1-2

    Develop a simple sketch, drawing, or physical model to illustrate how the shape of an object helps it function as needed to solve a given problem.