From what age can this lotion be used on children?

The product is explicitly not suitable for children under 2 years old. This restriction reflects regulatory guidance for 30% DEET formulations, which are considered too strong for very young children's thinner skin and higher surface-area-to-body-weight ratio.

For children aged 2 and above, an adult should apply the lotion. Put a small amount on your own hands first, then spread it on the child's exposed skin — avoid the child's hands (they touch eyes and mouth), the eye area, mouth, any cuts or irritated skin, and areas covered by clothing. Use just enough to cover exposed skin; a thin, even film is sufficient. Do not apply under clothing.

After returning indoors, wash the child's treated skin with soap and water. Wash treated clothing before wearing again. If the child shows any skin reaction (redness, itching, stinging), wash the area immediately and discontinue use. For children who will be outdoors for shorter periods or in lower-insect-pressure settings, a lower-DEET or DEET-free alternative may be more appropriate — consult a pharmacist or paediatrician for guidance specific to your child.