Hi! I could sign up for these riddles and be the one solving them as well since my daughter is too small for that too. But it's a great project, and I believe that many parents can use it with their kids. It's educational, and I'll definitely sign up for riddles once my daughter turns six. Right now, all she cares about is her wooden playground from
here, so it would be useless. But I saved your project, so be sure that you'll get one more follower in three years. Anyway, I really think your project is interesting, and I wish more people would know about it, so good luck!