I’m no authority in this, but I’m not sure I’d be offended at any point. I would just like to know that it was enjoyed for a time at some point, but I wouldn’t expect that if I gave a shitty gift lol. Kids can be obsessed with a thing for like 5 years straight or they can move on to the next thing after a weekend. This is why I think it’s kinda silly to spend a lot of money on pretty much any material thing for a kid. If little Timmy is interested in playing guitar, you get him a cheap guitar from Walmart or something first, not a $1500 Fender.

If you’re offended that a kid threw away or destroyed a gift you gave them, I guess you’re allowed to feel however you feel about it, but I think there’s more important shit to get spun up about in this world. And doing or saying anything beyond something like “it hurt my feelings that a gift that I put so much thought into was cast aside so quickly” is just going to make them upset without making you feel any better. Ultimately, a gift is a gift, and it’s the new owner’s right to do with it what they please.