Although a very young baby can't hold toys or take part in games, even the newest of newborns will get bored and lonely if his caregivers don't interact with him during most of his wakeful periods.
Your Baby Can Feel Lonely
For the first time in their existence, they experience physical separation from their caregivers. After constantly hearing a heartbeat and being 'held', being put down for long periods of time can be quite scary and lonely. Some infants will go down easily and seem content to be alone. However, in some situations they might have learned that no one will come if they fuss. Other babies make quite a bit of noise, alerting their caregivers they don’t feel secure on their own .
Do newborns get lonely?