We use English as the official language in daily communication. The little kids are therefore taught and aided in practicing English speaking. However, Kiswahili is also used to enhance communication, especially for those fresh from home.
Language is taught through songs, games, and child plays and in normal communication. By the time they are in Parrot and Butterfly, our young children can speak English and Kiswahili properly.
English is considered as any other language thus the ability to use it is not considered an intellectual ability. There is, therefore, no pressure on young kids who are slow to learn English.