Round Iron Filings Bubble Pack of 10 Age 8-9 In the timing mode

In the timing mode

layout a viaduct crosses over the railway track - trains can chug up the hill

high for cool constructions that are a breeze to connect

a really useful addition to any family or classroom library

Round Iron Filings Bubble Pack of 10 Age 8-9 In the timing modeThe Iron filings bubble is suitable for more simple magnetic field plotting experiments in place of loose iron filings. It comprises a shallow, sealed, clear plastic vessel containing high quality fine iron filings. It can be used on an overhead projector for demonstrations. In use, the filings are distributed evenly over the base of the bubble by shaking or tapping. The bubble is then placed over the magnet and gently tapped to permit the filings to