Why it works:

• No-prep printable - quick setup, step-by-step instructions, and a supply list you likely already have.
• High-engagement activity - the fizzing reaction and growing balloon keep kids focused from start to finish.
• Real learning built in - practice measuring, following procedures, cause-and-effect, and recording observations.
• Perfect for home or class - run it with one child, small groups, or as a demo with easy cleanup.