Some parents would not like to have devices such as tablets, mobile phones etc in their home from the other parent because of security concerns especially if there is a
Protection Order in place or where the parents just have not agreed about the child(ren) being given those devices.
Ideally you would be able to speak to the other parent and reach an agreement about what happens with the gifts that are given and whether they will transfer between households or not. If they are not going to, it would be best to explain that in a child focused way to the child to avoid confusion.