Squeeze a flat balloon and watch it self-inflate! Challenge students to offer an explanation. Ask your students to construct their own self-inflating balloon using water and baking powder, or vinegar and baking soda! Four self-inflating Mylar balloons are included. 14.5 cm flat dia. (5.75") Note: Inflated balloons are not lighter than air.
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A 25% handling charge is levied against all authorized returns except those due to our error. Unauthorized returns are subject to a 40% handling charge. Damages & defects must be reported to us within 14 days.
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