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Lisnagelvin Primary School, Richill Park, Londonderry

Sink or Float? P5 STEM

22nd Jun 2026

Our P5 children took on the challenge of building boats out of tin foil to see how many marbles they could hold before sinking. 

Through trial and error, they discovered how shape and surface area impact buoyancy. 

A fantastic experiment and great fun was had by all!