Tamagotchi

Tamagotchi is a keychain lcd pet toy released by bandai in 1996 and became a commercial success. Tamagotchi is made from two phrases: tamago meaning egg and uotchi meaning watch the reason why it says watch is because while they were designing the tamagotchi they decided for it to be a watch but that design was cancelled and then they decided for an egg shape which became the iconic shape of all tamagotchi releases.
The watch design does get reused for two releases, the tamagotchi smart and the tamagotchi uni.

Tamagotchi is a virtual pet