@pentie2003 Once he gets old enough that it bothers him to be perceived as younger, you can get him a button/hat/t-shirt that says "I'm 3 and I'm a Big Kid!".
He'll think it's super cool, and it takes the edge off strangers assuming he's younger.
@yoamocuy Selling the toy and buying whatever coffee/chocolate/adult beverage compensates you for suffering through a loud toy is also a good option...