Toys and Devices that help calm you

Hi my son has an obsession with electronical devices, tablet and PS4. As you can imagine he does get a lot of enjoyment from them but they do overstimulate him and cause him to flap and jump. Has anyone come across any toys or anything that help to calm themselves or their child. Just want to find something to calm him after he has played as he gets really frustrated and angry when he is told to stop.