1. Fifty kids are picked up for school by this bus every day.

Passive to Active Voice Transformation

1. Identify the object of the passive sentence: 'Fifty kids'. This will be the subject in the active sentence.
2. Identify the verb phrase: 'are picked up'. The main verb is 'pick up'.
3. Identify the agent (the doer of the action) in the passive sentence: 'by this bus'. This will be the subject in the active sentence.
4. Change the verb tense from passive to active. 'Are picked up' (present passive) becomes 'pick up' (present active).
5. Reconstruct the sentence in active voice: 'This bus picks up fifty kids for school every day.'

Active Voice: This bus picks up fifty kids for school every day.