How can we find out which pebble,stone or rock is the hardest? Tommy,dYlan,quaidE,LuCas

We need climing frame, pebble,stone ,rock and safety gogals.
We are going on the climbing frame.we will drop them off the climbing frame

The weakest stone will break into lots of pieces and the heardest stone will not break.

Be care full because there mite be glass mixed in with a pile of stones

Make sure you do not hit anyone.

Be caful becaese some pebbles are. Hevy

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