Put Everything Together
Combine parts from previous activities to build a simple working model, such as a cardboard vehicle with a small battery motor, safely test it.
About this activity
Combine parts from previous activities to build a simple working model, such as a cardboard vehicle with a small battery motor, safely test it.
What you need
Step by step
- 1
Step 1
Gather your cardboard chassis parts wheels motor battery pack and tools on a clear flat table.
- 2
Step 2
Cut a rectangle from the cardboard to make the chassis the size you want your vehicle to be.
- 3
Step 3
Use a pencil to mark where the front axle the rear axle and the motor will sit on the chassis.
- 4
Step 4
Cut small slots or holes where you marked the axle supports and a small slot for the motor shaft to reach the axle area.
- 5
Step 5
Tape or glue short drinking straw pieces under the chassis at the axle marks to act as axle supports.
- 6
Step 6
Push the wooden skewers through the straw supports to make axles and push wheels onto each skewer end so they sit snugly.
- 7
Step 7
Attach a small bottle cap or tiny wheel to the motor shaft with tape or a dab of glue to make a drive wheel.
- 8
Step 8
Place the motor on the chassis so the drive wheel touches the rear axle wheel and tape the motor down firmly in that position.
- 9
Step 9
Secure the battery holder to the chassis with tape and make sure the battery switch is in the OFF position.
- 10
Step 10
Connect the motor wires to the battery holder terminals securely using tape or a battery snap so the wires do not pull loose.
- 11
Step 11
Put your vehicle on a smooth flat floor and switch the battery ON to test if it moves for a few seconds.
- 12
Step 12
If the vehicle needs fixing switch the battery OFF before touching anything on the model.
- 13
Step 13
Straighten the wheels or move the motor slightly and tighten any loose tape to improve rolling alignment.
- 14
Step 14
Decorate your vehicle using colouring materials and small details to make it look awesome.
- 15
Step 15
Take a photo or write about your finished vehicle and share your creation on DIY.org
Fun facts
How do I put everything together to build a simple cardboard vehicle with a small battery motor and test it safely?
Start by gathering parts from earlier activities: cardboard chassis, axles, wheels, a small DC motor, battery pack, switch and wires. Mount the motor securely to the chassis with hot glue or tape, align the motor shaft with an axle or pulley, attach wheels, and secure the battery and switch. Check connections, keep loose wires insulated, and test briefly on a flat surface while an adult supervises. Make small adjustments for balance and smooth rolling.
What materials do I need to combine parts and build a working model vehicle?
Youâll need a cardboard chassis, small DC motor (low voltage), battery holder and batteries, a small switch, wires, wheels (bottle caps or craft wheels), axles (wooden skewers or dowels), tape, hot glue, scissors and a small screwdriver. Optional: rubber bands for drive belts, shrink tubing or electrical tape to insulate connections, and markers for decoration. Have an adult handle hot glue, cutting, and any wiring.
What ages is this âput everything togetherâ model-building activity suitable for?
This project suits children about 7â12 years old with adult supervision for cutting and wiring. Ages 10â13 can work more independently but still benefit from guidance when handling batteries and glue. Younger kids (4â6) can join by decorating, placing parts, or testing under close adult direction. Avoid giving small parts to children under 3 due to choking hazards; tailor tasks to each childâs fine-motor skills and attention span.
What safety tips should I follow when testing a cardboard vehicle with a small motor?
Always use low-voltage motors and fresh batteries; never connect batteries in ways that could short circuit. Insulate exposed wires, secure the battery pack, and mount the motor firmly. Supervise cutting, hot glue, and soldering; work on a nonflammable surface. Test on a clear, flat floor away from stairs and pets. Turn off and remove batteries between tests, and keep small parts away from children under three.
Watch & Learn
Need help?
What can I use instead of wooden skewers, drinking straws, bottle caps, or the specific battery holder if I can't find them?
Use straight pencils or thin metal rods as axles instead of wooden skewers, short sections of pen barrels for the drinking-straw axle supports, a large jar lid or plastic bottle cap in place of the small bottle cap drive wheel, and a generic AA battery holder or battery snap taped to the chassis if you don't have the exact battery pack.
My vehicle won't move or the wheels are stuckâwhat should I check?
Switch the battery OFF first (step), then check that the straw supports under the chassis are not squeezing the skewers, widen or re-cut axle slots so the axles rotate freely, and make sure the motor drive wheel (bottle cap on the motor shaft) is positioned to touch the rear axle wheel without slipping.
How can I adapt this activity for younger or older kids?
For younger kids have an adult cut the cardboard chassis and pre-thread the skewers through the straw supports and use larger bottle-cap wheels so they can focus on taping the motor and decorating, while older kids can cut their own chassis, fine-tune motor placement to improve rolling alignment, and experiment with different drive-wheel sizes.
How can we extend or personalize the finished vehicle?
Enhance the model by adding a simple pivot for the front axle to create steering, wrap rubber bands around wheels for better traction, mount a second motor for more power, and then decorate and share a photo or write-up on DIY.org as suggested.