As a teenager going into a US IKEA store for the first time, I felt completely lost. As an adult going into the same store for a second time 15 years later, it's not that bad.

I feel like if there was a fire, a lot of children would die due to being lost inside the store. They are easily seperated from their parents inside the store, especially when it is busy.

I too would not take children there unless it is the least-busy time with the fewest number of customers. (As an adult, I would probably be okay, but I might delay my egress to help others which could ultimately get me killed.)