Homemade Petri Dishes

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So, today we are making Petri Dishes. Not quite sure how it will all work out, but I guess we'll know soon enough!

We followed the directions HERE to make our Petri dishes. Basically, you add 4 packs of the unflavored gelatin, 4 cups cold water, 4 tsp. beef bouillon or 4 cubes, & 8 tsp. sugar together and stir constantly until it boils. You then pour it into muffin liners, filling each one 1/2 full, and let cool. Once they are set, you put each one individually into sandwich bags and store in the refrigerator until ready to use. Now, I didn't have the "foil" liners which were called for so we're using paper ones. So far they are holding up. Keeping my fingers crossed! I actually halved the recipe but it still ended up being more than we needed for today. Luckily, we can store the rest in the fridge until we need them.







A few days ago, I received a Violight toothbrush sanitizer to review. It is supposed to remove 99.9% of bacteria. I thought to myself, "what a great science experiment this could make!" So, as soon as the dishes are ready, we are going to swab a toothbrush that has not yet been sterilized in the Violight and then again after it has been in the Violight for 10 minutes and see what grows. My daughter is chomping at the bit to use our microscope and I must say, I, myself, am quite anxious to see just how well the Violight works.

Will post update on our germy little project later!

3 comments:

Born 2 Be Mom said...

Homemade petri dishes? I had no idea it was possible... Learn something new every day! Thanks for the follow - I am following back :)

Kristin
Born 2 Be Mom

Redheadedmom said...

oooh! this would be a great idea for kids' science projects- or science fairs!
Thanks for sharing!
Following you back
JoDee
www.atozformomslikeme.blogspot.com

Cindy said...

Hi, I'm a following you back. Thanks for visiting.

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