Scientific Child

For Christmas the boy got this science experiments book, which is better for his age group than the one that I mentioned in the earlier post.  The experiments and concepts are tailored more to a 6 to 8 year old, but many of them are still fun to do even if he doesn’t completely understand the science behind everything.

First you find “dirty” pennies.  The boy made it his personal challenge to find really really dirty ones.  Mix vinegar and salt together to create a weak acid.  You really should use white vinegar so you can see the bubbles easier, but all I had was apple cider vinegar, so that it was.  This is very stinky unless you love the smell of vinegar.

Drop them in…

and see what happens after they take a bath!

Before and After

If you leave them out to dry without rinsing, they get all crusty and blue.

We then took a few nails and dropped them into the vinegar and we forgot about the experiment for a few days as work and school took precedence.

When we wondered why the house smelled like vinegar and remembered about the experiment, the nails had a slight copper sheen to it, as you can see on the 2 left nails.  I wouldn’t recommend this as a method to plate your metal jewelery, though.

Here’s a page from the Exploratorium (my all time favorite place to go in the entire world, which completely solidifies my standing as an absolute and total NERD, as if you didn’t already know) that describes the experiment that we did and the science behind it.

Obviously, the boy is too young to understand about acids and ions and things like that, but he sees the change happening and it’s the first time that he can see the effects of tiny little things that he can’t visualize firsthand, and I’d like to think it stretches his mind.  The fun is in seeing how the world around you works, how you can manipulate it, and beginning to get the gears turning.

Pretty cool, no?

Experiences

That’s what the boy calls experiments, anyway. Currently, he wants to be a scientist when he grows up and do lots of experiences.  One of our earlier adventures was here, but now we’re able to do more complex ones.

A while back I checked out a library book with some kids’ science experiments in it, and there was a whole chapter on electricity and experiments with that.  I went to RadioShack, remembering it from my  youth as a place with random wires and springs and plugs on the walls with acne-faced bespectacled nerds roaming about, and instead found that it had become a mobile phone store with tacky furry talking animals for sale as well.  As it turns out, they do still carry all the wires and such, they’re just hidden away in industrial looking drawers in the back of the store.  (The acne-faced bespectacled nerds are now running all the large software companies and laughing all the way to the bank.)  I purchased a pack of alligator clip wires, copper wire, a buzzer, a switch, a light bulb and stand, and a 9-volt battery, and gave it to the boy for Christmas.

Some of the basic stuff is just learning how circuits work–how you have to complete the loop for the electricity to flow through, starting with a simple bulb. This one is already jazzed up with a homemade switch–nails into a scrap of wood, with a paperclip around them.  Squeeze the paperclip, and it completes the circuit and the light goes on.

Then things get even fancier, with the switch from the shop:

I teach him the basic idea by having him trace his finger along the wires from one battery terminal to the next, and showing how there has to be a continuous line for the electricity to flow and for the light to turn on.  In case you’re wondering, the 9 volt battery doesn’t conduct enough electricity through dry skin to buzz you.  The girl did stick one in her mouth, but it didn’t bother her too much, either. (kidding, only kidding. Sort of.)

The next cool thing is to make a game.  Remember that carnival game where you have to guide a loop of wire along another wire without touching it? Well, that’s just a simple circuit and we have all the tools to make it! You connect a bare wire between the two nails on the block, fashion a bare wire loop to go around it, hook it up such that touching those two completes a loop with the buzzer, and you’ve got a good half hour of entertainment.

Concentrating hard:

Aw, man!

He never did manage to win, sadly, but I confess I might have made it too difficult with a loop that was too small.  Still, he loves to mess around with the wires and such and figure out how to make it all work on his own, which is really the whole point.

More science experiments to come!