föräldraledig och förskola

1. Depending on which municipality you live in your child can be away for 1-3 months without losing his place. Some preschools and municipalities can allow longer time away if asked.

2. Some parents use their combined days so both can have paternity leave at the same time to make it possible to handle both preschool and the new born. But at the same time some parents keep the older kid at home during the first time to prevent the new born from catching any illness from preschool. But that usually only during winter. 

3. You have the right to have your preschool child 30 hours per week instead of the normal 15 hours per week when you have paternity leave for a new born. Other than that I don't know.