I want to give an assignment to my children to write a short story. I've given them a topic "Magic Banana". Now, I'm confused whether it should be magic bananas or magical bananas.
On the other hand, "Magic Banana[s]" allows a wider range of interpretation than merely the magical.
The thought of a 'magic banana' leaves me cold! While a 'magical banana' opens all kinds of vivid images and possibilities! You decide!
I'm not convinced that there is an actual difference here:
magic, the quality of being enchanting
Both are good. My vote, though, would be for "magical" because it sounds more enchanting.
Dawood, your children might like this (note, the site uses both phrases 'Magic Banana' and 'magical banana):
Magic Banana - EnchantedLearning.com
Make a magical banana that will really surprise your friends! Tell them that you've discovered a brand new, genetically-altered banana that grows pre-sliced. This is the best invention since sliced bread.