Etape 1Mix the water and the quick-setting moulding powder according to the instructions. Place a layer of the mixture on the bottom of the jar, not thicker than 1 cm. ![](stagepics/vertical_267_5f465a2b.jpg)
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Etape 2Wait for the moulding paste to harden (approx. 20 min), then add a layer of 1.5 cm of gravel. ![](stagepics/vertical_267_5f465a3a.jpg)
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Etape 3With a large awl make two holes in the thin plastic circle. Push the two straw sections through the holes, letting them stick out a bit the other side. Push the straws into the gravel layer. ![](stagepics/vertical_267_5f465a48.jpg)
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Etape 4Prepare some more moulding paste and fill the rest of the jar almost to the top. Wait for it to set, then decorate the surface to create a small landscape. ![](stagepics/vertical_267_5f465a5c.jpg)
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Etape 5Punch a hole in the center of the bottle cap and push through one of the flexible tubes for about 2cm. Seal on both sides with hot glue. ![](stagepics/vertical_267_5f465a6e.jpg)
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Etape 6With transparent adhesive tape, stick one thermochromic strip on the bottle and the other one on the small glass. ![](stagepics/vertical_267_5f465a87.jpg)
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Etape 7Download the diagram below from the Blueprints/Plans section and cover it both sides with transparent plastic sheet or laminate it. Cut out the outline.
![](stagepics/horizontal_267_5f465ac0.jpg)
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Etape 8Open the cardboard ring by cutting it vertically.
To make it waterproof, cover it with plastic sheeting or laminate it ![](stagepics/vertical_267_5f465b17.jpg)
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Etape 9With double-sided adhesive tape, fix the ring inside the diagram to form a cylinder. Staple both ends to fix it well. ![](stagepics/vertical_267_5f465b31.jpg)
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