As soon as my sons could hold something I put a 0
As soon as my sons could hold something I put a 0.5kg dumb bell in their hands.
At 1 year they throw around the 2kg dumb bells, do air squats, pushups, planks and supermans.
The 7 year old follows me on my routines, doing a lighter version of all my exercises.
They love it.
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