An advocacy group called on toymaker Fisher-Price to stop selling a baby seat designed to hold an iPad at the front.
It said the product encourages parents to leave infants alone to watch screens that could be harmful.
The bouncy seat with an iPad holder is claimed to be the "ultimate electronic babysitter".
But the Campaign for a Commercial-Free Childhood, based in Boston, in the US, said it blocks a baby's view of the world, undermining the child's interaction with caregivers.
The group cited research by the American Academy of Paediatrics that suggested screen time for children under the age of two was linked to language delays, sleep disturbance and learning problems later in childhood.
There was no evidence it was advantageous, the group said.