Happy Mother's Day

Squishy Egg

How to make a squishy egg.

You will need one egg, white vinegar and a glass.

Place the egg in the glass and pour vinegar so the egg is completely immersed.

Acetic acid in vinegar reacts with calcium carbonate in eggshell and produces carbon dioxide that you can see as bubbles.  The process dissolves the eggshell, but not a membrane.

The next day remove the egg from the glass and rinse the remaining shell.

You will be able to see yolk through the membrane.

You can play with it, just make sure you do it over the sink since it is very easy to pop the membrane.

Poke it.

Squish it.

Whoooooops.... break it.  Now you can see the membrane, and yolk surrounded by egg white.

Have fun playing and exploring.

Toothpick Star Puzzle

What is the least amount of toothpicks you need to use to make a six-pointed star?

How many toothpicks do you need to make a six-pointed star without overlapping the toothpicks?

Solution