A toddler needs manipulative toys to develop patience and motor control. Blocks to stack, puzzles to fit together, balls to throw and catch, books with pages to turn. Nothing electronic at all.
... which gets ever more hard to provide, sadly. Many people can't really afford an appropriately sized home - but in contrast to "earlier" times, can't send the kids outdoors as a replacement either as they're unsafe due to car-centric culture, the death of third spaces and, in the US, gun and other violence.