I knew this leak proof bag science experiment with the kids was a project that would have a high fun factor since the kids LOVE anything that includes water play. Since it is such a simple science project it was the perfect addition to our DIY summer science camp.
I wanted to do the experiment outdoors and as long time readers (group hug!) know, we live in an apartment, so I packed up the supplies as we headed out for a day at the park. It made a nice break when the kids started whining about going home and bought me some more time away from the apartment.
Materials
- Sealable plastic bags
- Sharp pencils
- Water
- Bored or enthusiastic children
Instructions:
1. Fill the bags with water. When we got to the park we found this awesome drinking fountain station set up! (Sorry about bad photo, I accidentally had my camera set to 1600 ISO!) We did get a few curious looks when we filled our bags, but never mind!
2. Close bags tightly.
3. Poke pencils through bags. My 9-year-old lay the bag flat on a table, but it works better if you are holding the water-filled bag upright.
Be sure not to pull the pencils out of the bags on the other side. The tip needs to be poking out one side, and the eraser needs to be sticking out the other side. If you pull the pencil completely out the other side, the bag will leak. Obviously.
There was a lot of free play with this science experiment because naturally, water is always fun to play with on a hot day.
The science Behind It:
The leak proof bag science experiment works because plastic bags are made from polymers. Poking the pencils through the bag only separates the molecule chains, it doesn't break them. My 9-year-old is only starting to understand the concept of molecules, so this was a great starting point for him. Of course, my 5-year-old was more interested in what happened when you pulled the pencil out!
What was my 5 year old's favorite part?
He could create his very own personal drinking fountain.
Be sure to check out more science camp activities:
Ann says
Neat! My kids love playing with water too. I think I will put these supplies in my bag to try at the pool today, not the "bored or enthusiastic children" they won't fit 😉
Erica MomandKiddo says
🙂
Almost Unschoolers says
Another classic we need to try again!
MaryAnne says
Yep, this is on my to try list as well...
studyathomemama says
All I can picture is my daughter going and attacking all of the plastic bags in the fridge that I use to store/defrost/marinate meat... She already uses pens to open things more than scissors (something she may or may not have witnessed from me...)
Erica MomandKiddo says
Yeah, that might not be so good! 🙂