Some electronic metronomes have lights that flash or bells that ding in addition to the peep. Some produce more than one sort of peep. Most electronic keyboards have a built-in metronome. When all is said and done, I still go with the old-fashioned mechanical metronome. It's not without drawbacks, though.
Mechanical metronomes are fragile.
Do not encourage the cat to become fascinated with it. For size and price and loudness, I recommend a Taktel Piccolo. A metronome is an investment your child will use forever. Don't scrimp on this purchase, please.