Our class room is full of choices and our children are free to decide what they want to engage with. During open play I often see mixed ages collaborating. It happens organically as one or more children take an interest in something others become curious and join. Today they constructed with straws and connectors, melted rainbow ice cubes, painted on fabric, walked a balance beam, had a picnic, and more. Because they have choice there are moments of time where talking is minimal and focus is high. The children are engaged in their work. This is how learning happens.