Many types of childcare discuss the different ways in which children are cared for by adults or older children. One additional type of child care involves children caring for adults. Children as caretakers are most often seen in developing countries with restricted or hard-to-access medical assistance. Child caretakers are common in families where the parents are affected by HIV/AIDS and other mental illnesses that might limit their parental functioning.[22]
Spain provides paid maternity leave of 16 weeks with 30-50% of mothers returning to work (most full-time) after this[citation needed], thus babies 4 months of age tend to be placed in daycare centers. Adult-infant ratios are about 1:7-8 first year and 1:16-18 second year.[citation needed] Public preschool education is provided for most children aged 3–5 years in "Infantil" schools which also provide primary school education.[citation needed]