May 31, 2012

Oobleck

     I think most everyone has played with oobleck at some point. That strange cornstarch mixture that oozes through your fingers until you apply pressure to it.  The girls have played with it before, but it has been so long that I thought it would be a good time to make some!  The recipe we used is 1 C cornstarch and 1/2 C water, but that can be adjusted to make however much you want as long as it is 2 parts cornstarch to 1 part water.  It seems to work best when mixed with your hands.


     Bria saw me mixing it and automatically declared that it was gross, but once Nadia started playing with it she changed her mind. Of course Eli wanted in on the action, and since it is safe to eat, he got to play too! He played with it for a bit, but quickly decided it was best to eat. Eventually he got stuck in his booster seat where the amount he could eat was more controlled.




     The girls had so much fun with it; they didn't even want to stop for lunch! They would round it all up in one place and pat it flat or pick it up and roll a ball only to have it ooze away.


      How does it work though? The cornstarch is simply suspended in the water (rather then being dissolved). The mixture is a non-Newtonian fluid which means its state is not determined by temperature but by force. When allowed to move freely or sit still the cornstarch particles can move making it appear liquid, but when squeezed or pressed the cornstarch has no where to go making it appear solid. release the pressure and it appears liquid again.

 
      Now for clean-up, throw as much as the oobleck as possible in the trash rather then down the drain. Too much can clog the drain.  Of course all of the oobleck stuck to your kids will have to be washed down the drain, but it does rinse off nicely!


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May 28, 2012

S'm'oreos

     I saw a picture of these the other day on pinterest, but it didn't actually take me to a link for the recipe. I decided to make them on my own without a grill (I refuse to learn to operate a grill).  As I suspected they are really easy and really yummy!


     You need oreos (Like always I got double stuffed), marshmallows (we found flat ones), and chocolate bars.  I started by turning my oven to broil and lining a cookie sheet with foil to catch any mess. Then I un-twisted my oreos and placed the side without cream filling on the cookie sheet.


     Then add a marshmallow on top of each cookie.  The flat ones worked well even though I really wanted round ones since oreos are round.  I think if you took a big round one and cut it in half to make shorter round ones they would be perfect.


      Place these on the top rack of your oven for just a little bit. Seriously don't leave the kitchen unless you want burnt marshmallows.  We started placing the chocolate on the other side of the cookie while the marshmallows got toasty.


     Watch the marshmallows closely, so you get the perfect degree of toastiness for you; then pull them out.


     Immediately top with chocolate and cream side of cookie.  Allow to set a few moments for it all to melt together and cool just a bit. Then enjoy!



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May 27, 2012

Lava Lamps

     Of all the activities we have done this has been one of the girls favorites!  We ended up playing with them for over 2 weeks!  Here is the link we used: http://slsmithphotography.typepad.com/my_weblog/2010/06/lava-lamps-summer-fun.html

    All you need is plastic bottles, water, oil, food coloring, and alka seltzer (we ended up going through a few boxes).  Start by filling the bottle over half full with oil. Then add water leaving a little room at the top.


     Add 10 drops of food coloring.


    Break one alka seltzer tab into 4 pieces.  And add 1 of those pieces (too much will make the bottle cloudy). Instant lava lamp (without the light)!


      Once the bubbles die down a bit you can safely add another piece of alka seltzer.


     The science part: alka seltzer releases carbon dioxide (CO2) when mixed with water (which makes the bubbles).  The bubbles carry the water drop to the top of the oil where they burst releasing the CO2 into the air and allowing the water to fall back through the oil (since we know water and oil won't mix as water has a higher density)..


      Like I said earlier the girls loved these and played with them over and over for two weeks!  We just capped them between uses to keep them from spilling.




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