9-10 years old is old enough to have a mature attitude about this. Simply ask him if he would like them, and if he would then give them to him.
Reading your question, though, it sounds to me like this is more than just wanting your child to have something for his own benefit. It sounds like you specifically want this to be successful - like these mattered to you as a child, and you'd like him to share in your joy in these.
In that case, then you can increase the likelihood he might enjoy them by talking about why they were important to you as a child, about the good memories you had with them. If it matters to you, then tell him why it matters to you. It's possible he'll still not be interested in it, but sharing your feelings and memories can help him understand why it's important to you.
Ultimately, be prepared that they might not be his thing - and that is okay. Perhaps disappointing, but you can't force him to enjoy things of course. If that happens, then at least you still have your fond memories, and he understands you better.