Yes, these toys are great fun for kids, but parents, do purchase any toy that makes a loud noise with caution. If your child can use the toy properly then there's no problem.
But if your kid is just going to get carried away (as many of them do!) and end up loudly blowing the whistle or trumpet in someone’s ear, it's probably not the best idea as the loud noise can be very irritating.
In extreme cases the noise could even cause damage to the ear-drum or scare a younger child.