-Messenger file photo
Students cover their ears and close their eyes as Aimee Langager, with the Science Center of Iowa, demonstrates what happens to a balloon full of hydrogen when it’s held over a candle at Butler’s Learning After School Time event.
-Messenger file photo
Students cover their ears and close their eyes as Aimee Langager, with the Science Center of Iowa, demonstrates what happens to a balloon full of hydrogen when it’s held over a candle at Butler’s Learning After School Time event.