Use your imagination to See them grow from Size (diameter): Dry: 2.5-3.0mm. Hydrated: 25 to 30 mm when fully hydrated. Once you touch and feel them, you won't want to put the bead down. You'll just love handling them. Hours of Science Educational fun for kids.. WARNING: Adult supervision strongly advised with young children, DO NOT INGEST, CHOKING HAZARD, and sweep up spills immediately.
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