Hello Kitty Garden Cafe @ Changi Airport is open 24hrs, the Q to get in is still an hour long regardless of when you visit.
The gift shop with specialty items like garden tea blends, postcards etc.
I ordered something light as this is supper (after dinner).
Prawn & wasabi quesadillas, violette soda pop, cheesecake ice-cream.
If the Q is too long, just get a slice of cake or ice cream from the gift shop instead. I should have done that earlier.