Let me illustrate possible locations of alle in another similar example:
Die Kinder trinken ihre Limonade.
Now when putting emphasis on the fact that it was all children we may say:
- Alle Kinder trinken ihre Limonade.
or to shift the emphasis on all were drinking:
- Die Kinder trinken alle ihre Limonade.
However now it becomes unclear if it were all the children, or if all their lemonade was drunk.
- Die Kinder trinken alle ihre Limonade.
To clarify that the emphasis was on the lemonade we may better use all instead:
- Die Kinder trinken all ihre Limonade.
Do not get confused by another colloquial use of alle in the meaning of completely:
- Die Kinder trinken ihre Limonade alle.
This would mean The children are drinking up their lemonade.
Grammatically we could even create a tongue twister and say:
- Alle Kinder trinken alle all(e) ihre Limonade alle.