Children learn about several tools for observing and measuring (for example, a ruler, a magnifying glass, a thermometer) and then use them during their own investigations.
(Children; learn; about several tools for observing and measuring) (for example, a ruler, a magnifying glass; use; them; T:during their own investigations; T:then)
Children for example, a ruler, a magnifying glass
learn use
about several tools for observing and measuring
them T:during their own investigations T:then