Noah is an example of a real problem for KS1 children. It's a real problem because it's unlikely that the children will have seen it before so they have to work out what to do - a problem is only a problem if you don't know what to do. If you do know what to do, it's not a problem! Given a free choice, some children will make animals out of materials around the classroom, others will record on paper. They'll do some guessing, some discovering and as they work they will be being introduced to, or will consolidate, all sorts of ideas in number such as different ways to make 12, or the concept of odd and even. And when they have finished they will have produced something that is unique to them and which hopefully they will be proud of!