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  • Megan Weller

DIY Shrinky Dink Agate Slice/Geode Coaster!

Hey guys, it's Megan!


I recently made a video showing you 10 Craft Supplies You NEED to try, and one of those supplies is Shrinky Dinks.


In the video, I showed how to make these Geode/Agate Slice Coasters. If you'd like to see the video tutorial, click here.


Otherwise, let's jump into it!


*Some of the links below are affiliate links, meaning I may earn a small commission if you purchase something through my link. See my disclosure for more information.*


For this project you'll need:


*Shrinky Dinks Rough and Ready Shrink Plastic

*Ohuhu Alcohol Based Markers (any alcohol based markers will work)

*Posca Paint Pens

*Scissors

*Geode outline template

*Mod Podge Dimensional Magic (optional)

*Masking Tape (optional)


First, print out or draw an agate slice outline to trace. I just googled "geode drawing", and came across this image.


Take your Shrinky Dink plastic, and place it on top of your printout with the shiny side up. You can use a bit of masking tape to hold it in place.

Next, use Posca Pens to trace the outline of your geode.

Trace the outline of the geode with purple, gold, and white Posca Pens.

I used a purple, gold, and white Posca pen.


After you've traced everything, remove the tape and flip your Shrinky Dink plastic over so the rough side is facing up.

Remove the masking tape form the Shrinky Dink plastic, and flip it over once you've traced your design.

Tape the plastic sheet back down, and fill in your geode with alcohol based markers.

Flip the shrink plastic over to the rough side, and color it in with Ohuhu Brush Markers.

I used my Ohuhu 120 Brush marker set in the colors P3 (pastel violet), P4 (lavender), P5 (Aubergine), and R11(Mauve Shadow).


Keep in mind that the colors you use will be slightly darker when baked.


When you're finished coloring, cut out your geode shape:

Cut out the purple geode Shrinky Dink with scissors.

Put it on a baking tray covered with parchment paper, and bake it according to the package instructions. (Mine said to bake about 3 minutes at 325 degrees.)

Place the geode Shrinky Dink cutout in the oven for 3 minutes at 325 degrees.

I'm sure most of you have worked with Shrinky Dinks before, but if you haven't: don't panic when/if the plastic starts to curl up. It will flatten out when it's done shrinking. If it doesn't for some reason, you can always flatten it with a heavy book when you remove it from the oven.


When my finished piece cooled, I colored the edges with my gold Posca Pen, and sealed the top (the shiny side) with a layer of Mod Podge Dimensional Magic.

Coloring the edges of a Shrink Plastic coaster with a gold posca pen, and doming the top with Mod Podge Dimensional Magic.

If you don't have Mod Podge Dimensional Magic, you could used any other sealant you'd like (uv resin, polyurethane, Mod Podge, etc.)


Once everything dries, your geode coaster is ready to go!

Finished DIY Homemade Agate Slice coaster sitting outside on a picnic table.

If you're not a huge "coaster person", you could also use this technique to make wall art.


I just picked up a frame from the Dollar Tree (4 x 6 inches), put a piece of card stock paper where the picture is supposed to go, and stuck the geode to the glass part with some Blue Tack (you could also use hot glue, E6000 glue, etc.)

Shrinky Dink Geode Wall Art in a Dollar Tree frame.

And that's all there is to it! This is the perfect rainy day activity to do when you're stuck at home 😉 Hope everyone is doing well! 💜







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