Borax Ornaments | Kids Crafts & Activities for Children | Kiwi Crate

Borax Ornaments

Borax Ornaments
Messiness: Medium
Age Range: 3y - 9y
Estimated Time: <30 mins

Activity Designer

Stephanie Sims
167 Projects

We have favorite crystal ornaments, and these are it! No waiting for weeks for these crystals to form...using borax instead of salt or sugar will give us completed ornaments in one day!

How We Did It

Borax Ornaments
There are lots of different recipes for growing borax crystals, but we've done this lots over the years, and you don't need nearly as much as some recipes say! Three tablespoons of borax per cup of water does it just fine. (For simple measuring, remember that 16 Tbs is equal to 1 cup.)
Borax Ornaments

For a precise water amount, you could put water in your jars, then pour it into a measuring cup to measure exactly how much you'll need, but I just guessed 12 cups for three jars. (Actually, I underestimated, and we had to go back and make two more cups, but easily done!) We heated up the water. We boiled it, but that isn't strictly necessary, as long as it's very hot--hot enough to dissolve the borax.

Borax Ornaments

"In it goes!" says the littlest chemist.

Borax Ornaments

We stir, stir, stirred.... and then got the snowflakes ready. (Over the years, we've done icicles, pink hearts...lots of different shapes!) This time Madeleine had a brilliant idea for a candy cane!

Borax Ornaments

When they were shaped the way the children wanted -leaving one end very tall to reach well over the top of the glass- they wrapped the top (longer piece) around a pencil. There are two more steps here: Make sure that your creation is narrow enough to fit through the mouth of your jar (it can be tilted, and "worked" out), and put your shape inside the jar and make sure it is hanging freely, and not resting at the bottom. Some of the borax will settle to the bottom of the jar, and you don't want your snowflake stuck to the crystals forming there.

Borax Ornaments

After checking that everything was just right, the kids were ready to stir again and then pour in the solution!

Borax Ornaments

We made sure the designs were hanging freely (not stuck to the bottom or sides), and filled them up the jars.

Borax Ornaments

Next we moved the jars to a shelf where they could sit for several hours. (Where we kept a close eye on them!) After a couple of hours, as the water cooled, we could see the crystals forming. While salt and sugar form cube-shaped crystals, borax forms six-sided structures. We like to leave them in for a whole day. You could try for longer!

Borax Ornaments

The science behind it all: The hot water holds more borax than cold, because heated molecules move further apart from each other, leaving room between for the borax crystals. As the solution cools, the water molecules move closer together again. Now there's less room, and the crystals begin to form and build on one another. Snowflakes in the wintertime are formed in the same way!

Comments

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What am I doing wrong? Our ornaments didn't crystal :(

posted by: Snow on 12.20.2013

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