We’ve got frightfully fun Halloween craft ideas! Get a little spooky with our ghoulish activities, make a jack-o-lantern, or a freaky monster, the list goes on…

Jack-o'-Lantern Lava Lamp – STEAM Halloween

Combine science and Halloween with our fun DIY Lava Lamp! Explore the key scientific principles of polarity and density as you watch your jar jack-o'-lantern bubble away.

You will also need oil, water and an effervescent tablet to complete this activity.

  • Step 1Draw a jack-o'-lantern face on the outside of your glass jar. Allow to dry. Bake the jar to make the design permanent following the Glass & Porcelain Marker instructions. Allow the jar to cool before continuing.
  • Step 2Twist two or more chenille stems around the top of the jar and bend the ends into spirals to create the top of the jack-o'-lantern.
  • Step 3Fill the jar approximately one-third full of water. Add a few drops of orange liquid watercolour (a little goes a long way!) and mix well.
  • Step 4Fill the jar with oil, making sure not to overfill it. We have used baby oil, but you could also use a cooking oil such as vegetable oil. You could even experiment with both to see which you think works best!
  • Step 5Add an effervescent tablet to the jar and watch your Jack-o'-Lantern Lava Lamp come to life!
  • How does this work? Water is a hydrophilic (water-loving) compound, while oil is hydrophobic (water-fearing), meaning that they won’t mix. The lava lamp effect is created as the effervescent tablet reacts with the water in your jar, creating carbon dioxide. The bubbles of carbon dioxide created attach to the water, bringing it to the surface as it is less dense than the oil!

Materials used in this activity

Chenille Stems - Pack of 1,000
Product Code: 10823
EACH $27.49 (inc GST) $24.99 (ex GST)
5 or more $21.99 (inc GST) $19.99 (ex GST)          
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Product Code: 14731
EACH $2.75 (inc GST) $2.50 (ex GST)
24 to 95 $2.48 (inc GST) $2.25 (ex GST) 96 or more $1.93 (inc GST) $1.75 (ex GST)
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Product Code: 16341
EACH $9.89 (inc GST) $8.99 (ex GST)
Increase value Decrease value
CleverPatch Glass & Porcelain Marker - Fine Tip - Black
Product Code: 18545
EACH $10.99 (inc GST) $9.99 (ex GST)
5 to 9 $8.79 (inc GST) $7.99 (ex GST) 10 or more $7.69 (inc GST) $6.99 (ex GST)
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