> sticking their thumb over one end of a straw dipped in the liquid Brings back memories of learning how to do that with my siblings. Every chance we got, we w

> sticking their thumb over one end of a straw dipped in the liquid Brings back memories of learning how to do that with my siblings. Every chance we got, we would scrunch up straw wrappers and then use the method to animate the wrapper with liquid. Not certain if I should show my kids how to do that.