This hack allows you to play your own custom messages through an animatronic talking Hamster. If you are unfamiliar, these hamster toys repeat everything you say in a cute cartoonish animal voice while bobbing up and down. By replacing the hamster's microphone input with an audio feed from an Adafruit Audio FX board, and using a vibration switch as a trigger, you can have the hamster basically say any prerecorded message you want when you tap its nose. This makes for a fun and easy personalized gift for children of all ages.
While this isn't a difficult electronics project, it does require some knowledge of electronics and soldering. To learn about both, check out the Electronics Class.