With the Leak-Proof Bag experiment, the objective of this experiment is to show that plastic has a lot of properties and that it is very stretchy. With the Leak-Proof Bag experiment, we'll show you how you can stick a bunch of pencils right through a bag of water without spraying water all of the kitchen table. The secret isn't sorcery, it's just the chemistry of polymers. |--| Click Here to Subscribe to HooplaKidzLab:.