A Witch in the Family (2000)

Maria is 8 years old and thinks her younger brother is really annoying. She meets Makka in the neighborhood who has a magic ball. In some way Maria wishes her brother away. When the babysitter Gerda turns up Maria and Makka think she's the answer to Maria's wish - a witch that has come to abduct her brother. Maria who deeply regrets her wish must now do everything in her power to stop Gerda.