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STEM project for kids: How to make a wobble Detector at home

Hi there!!

Welcome back to your favorite fun and learning platform. If this is your first time here, this is Makersgeneration: Your go-to platform for learning about cool science project ideas for kids. Here, we make science fun for everyone!

Today, we are going to make and play a little game. In this game, we have an open circuit consisting of a bulb, a battery, and some wires and all we have to do is make sure the circuit does not complete (lighting up the bulb) even as we move the end wires as close as possible to each other - lol. Sounds funny right?... that's why you should keep reading to find out how!

We call this game "Wobble Detector". "Wobble" can refer to a shaky or unsteady movement. For example, if an object is vibrating or moving irregularly, it might be described as having a wobble. So, if our hand is shaky and the circuit connects, it will count as wobble detected, hence the name.

This can be a great science project for first-graders.

Materials we'll need

  • Battery.

  • LED (bulb).

  • Breadboard.

  • 100 - 220 ohms resistor.

  • 3 insulated wires with stripped ends.

  • A long piece of completely stripped wire.

  • 2 Thump tacks.

  • Cutter or scissors.

  • Wooden board.

  • Tape.


To ease with the steps, let's take a look at the circuit below:

The pink, black, and blue wires represent the three insulated wires, while the red wire represents the long completely stripped wire.

Steps to make a Wobble detector:

Step 1:

Attach two insulated wires to the positive and negative terminals of the battery then secure them in place with tape.

Step 2:

With adult supervision, hammer the two thump tacks into the wooden board with appropriate space between them.

Step 3:

Bend the stripped metallic wire into several curves and wrap the two ends to the two thump tacks on the wooden board.

Step 4:

Wrap the stripped end of the wire connected to the positive terminal of the battery to the thump tack to your left.

Step 5:

Fix the LED to the breadboard and attach a resistor to the anode (+) leg of the LED.

Step 6:

Connect the remaining end of the wire attached to the negative end of the battery to the cathode (-) leg of the LED through the breadboard.

Step 7:

Attach one end of the third insulated wire to the remaining leg of the resistor then fold the other end of the wire into a loop. Your wobble detector is ready to play with.

Video demo:


You can add a buzzer to your project for additional sound notification

Sadly, we have to end here today. Thanks for following up to the end!

This project can make a cool electronic kit for home.

Check below for more on how to make gadgets for kids and more fun labs:

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