State Emergency Service volunteers and school staff have been walking through buildings and “mapping all coloured sand they see” over the weekend, she added.
The ACT government said that people who have been in contact with the product do not require a clinical assessment.
Berry said despite the minimal risk, the government is “required to eliminate risk as much as reasonably practicable”.
Up to 23 schools will remain open as they either have “small stocks” of the sand or do not have any of the product.
The products set out in the recall notice are labelled as Active Sandtub 14 piece Sand Castle Building Set, and Blue, Green and Pink Magic Sand.
Asbestos, once widely used in building materials, can release toxic fibres into the air if disturbed or processed that can cling to the lungs and – over decades – cause cancer.
Importing or exporting asbestos or goods containing asbestos is prohibited under both Australian and New Zealand law.
