1. Comparative structure: The phrase "on the other hand" is used to contrast children's learning with adults', which is implied but not directly stated. This helps set up a comparison, even though the adult side could be more explicit.
2. Present simple tense: Most of the answer uses the present simple (e.g., "learn best," "need," "is often mixed," "tend to pick up"), which is appropriate for describing general truths or habits.
3. Passive voice: "is often mixed with games and hands-on activities" uses the passive voice to focus on the experience of learning rather than who is doing the mixing.
4. Infinitive and gerund: "tend to pick up" (infinitive) and "without realizing they’re learning" (gerund) show a good range of grammatical structures.