A CTY Science Project:
How to Make a Hand Blender

The Johns Hopkins Center for Talented Youth (CTY) brings science and engineering
to life with online courses for students in grades 3-12.

CTY’s challenging online science and engineering courses are led by expert instructors who specialize in teaching advanced concepts to academically talented students. CTY’s Online Programs are flexible and available year-round.

1. Gather the following supplies:

  • Clear tape and/or electrical tape

  • Scissors/box cutter

  • Wire cutters

  • Hot glue gun or other strong glue

  • Pen/marker

  • Tweezers/needle nose pliers

  • Get an adult to help with this project

  • Protective eyewear

  • Motor with 2 short wires attached

  • 1 AAA battery

  • Small whisk with open end on handle

  • Empty/clean, wide-mouthed plastic juice bottle

  • Paper clip

  • Rubber band

CTY Online Programs’ science and engineering courses for grades 3-5 include:
Inventions in Engineering and Introduction to Computer Science and Engineering.


2. Make the Handle.

Cut juice bottle all the way around about two inches from bottom and dry the inside. Discard bottom.


3. Prepare pass through

for wires.

Cut a small hole at the top of the bottle near the neck toward the bottle lid for the wires to pass through.


4. Prepare Motor.

Cut a hole in the bottle lid the shape and size of your motor.


5. Insert motor.

Place motor halfway into cap, pin side pointing out, making sure it is straight. Make sure motor fits in opening. Use glue to secure the motor into the cap.

CTY Online Programs’ science and engineering courses for grades 6-8 include:
Earth and Space Science, Life Science, and Physical Science.


6. Screw lid onto bottle.

Screw on lid and feed the wires outside the small hole by grabbing the wires with tweezers or pliers and gently pulling them through.


7. Attach motor.

If your whisk has a loop on the end, use wire cutters to snip off. Place a large amount of glue on the end of the whisk, and push the motor pin in the center. Hold straight while the glue sets. Once glue dries, make sure to wiggle pin and loosen any hardened glue.


8. Get ready.

Slip rubber band on bottle and move toward bottle cap. If you have loose connections, tighten all wires. Tape battery onto bottle near rubber band.


9. Connect power.

Use tape to attach negative wire to negative end of the battery. Attach positive wire to paper clip and slip it under the rubber band. Bend the opposite end of the paper clip up slightly to touch end of battery.

CTY Online Programs’ science courses (with AP and NCAA Approved options) for grades 9-12 include:
Honors Biology, Honors Chemistry, Honors Physics, and Intro to Forensics.


10. Whip it!

Your whisk should begin to move. If it does not, be sure to point the whisk down and check your connections to make sure you have a closed circuit.


About the Johns Hopkins Center for Talented Youth
Johns Hopkins Center for Talented Youth (CTY) is the world leader in gifted and talented education,
serving the world's brightest students. Johns Hopkins University is a 501(c)(3) nonprofit.

For more information about CTY Online Programs, visit or contact us at