H1, H4 Parents Child has Canadian Passoprt.. Should the child get US Visa stamping

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Me and my husband have H4 and H1 respectively. We are having our child who will be a canadian citizen. Should the child get USA visa stamping.. if it has to enter USA from India or Canada. As far as I know Canadian citizens do not need Visa to enter USA. Is there a seperate rule for children below 18 years. please help if any one knows a solution for this