Children's toothbrushes: 4 for ages 2-13

▸ Applicable age: 2-13 years old special design
▸ Product type: baby toothbrush
▸ Brush head configuration: 4 independent
installations▸ Bristle type: ultra-soft filament bristles (to be verified)
▸ Safety certification: food-grade TPE material (to be verified) (Note: The actual optimization requires the manufacturer to provide material parameters, and there are hypothetical contents in the current version)