Nintendo does not set a minimum age for using the DS/DSi/3DS hardware itself. A toddler can hold a 2DS (designed for young kids) safely.
Every game carries an ESRB rating that guides age-appropriateness:
| Rating | Age Guideline | Content Descriptors |
|---|---|---|
| EC (Early Childhood) | 3+ | No objectionable content. Educational. |
| E (Everyone) | 6+ | Minimal cartoon/fantasy violence, mild language. |
| E10+ (Everyone 10+) | 10+ | More cartoon violence, mild language, suggestive themes. |
| T (Teen) | 13+ | Violence, crude humor, minimal blood, gambling sim. |
| M (Mature) | 17+ | Intense violence, blood/gore, sexual content, strong language. |
The hardware is ageless; the software is rated. Choose games wisely.