Private kindergarten or daycare in Stockholm (before getting personal number)

Hello Everyone I am new in this forum, I am moving to Sweden on late February with my wife, which is pregnant, and our 2 kids (4 and 3 years old). We have been informed that getting a personal number will take 2-6 weeks. After that another 3 months until we have kindergarten. Does anybody know other options of day care for this long time? Since my wife will be in the last months of her pregnancy and I will start working almost immediately after we arrive, we are going to need some help with our children. Thanks in advance for your help! Boris