A smart toy is an electronic device which learns how a child interacts with it and then changes its behaviour in reaction.
The simplest example on display here is the Pocket Simon (1), a toy which asks the user to copy a pattern played on the four coloured segments. As the player improves the level gets harder and the game demands more mental and physical dexterity. A step up from this is the Tamagotchi (2), an electronic pet which responds to being fed, played with, and cared for. Growing up from a baby hatched from an egg to an adult creature. However, if the owner did not look after the Tamagotchi correctly it would become unwell and die.
The Furby (3) is also an electronic pet but with a more realistic physical presence. It is able to show emotion and learn language, the more it is played with the happier and more comprehensible it becomes.
Poo-chi (4) and Teksta (5) are both electronic puppies which can learn tricks and commands at differing levels. Again, the more the user plays with these devices the more they learn and respond favourably.
All of these toys have the common factor that their casings are made of plastics. These materials have the ability to provide protection for the electronic circuitry by being waterproof, and to the person using them by being electrically insulating. The materials can also mimic fur or take on specific colouring to a satisfactory and realistic degree and offer a lightweight framework to make the toys easy to carry around.