Marble Roller Coaster- 1 inch foam pipe insulation cut in half ( about 4 per student), masking tape, marbles
Marble Roller Coaster- 1 inch foam pipe insulation cut in half ( about 4 per student), masking tape, marbles
Source: HERE
Marble Roller Coaster- 1 inch foam pipe insulation cut in half ( about 4 per student), masking tape, marbles