Enter their address in the Shipping Address field and your own in the Billing Address field. Note that the package is labeled "AncestryDNA" by default; for a surprise, select the Gift Wrapping option at checkout.
Kits typically retail for $99, but frequent sales can drop the price significantly, sometimes as low as $39 during holiday periods. ancestry dna buy as gift
You can easily purchase a kit through the official AncestryDNA Gift Page . Enter their address in the Shipping Address field