You could visit copyright free websites to download PNGs of what you want your gift to be (a gift box/whatever the gift is) and upload it to the art catalog in the portal as an overlay.
You could then add it to your scene and have the character doing a box holding animation or a giving object animation with the overlay on a layer above them to make it look like they’re giving them a gift.
If you’re unsure of layering and overlays, here’re Dara’s guides: