Idiom:

Rocket science ( something complicated )

Hit the book:
Tip top ice cream
Hemisphere
Partial
Marshmallow
Obsess
Merit
Nauseam
Hit and miss
Stunning

7. Kiwis love their Tip Top Ice cream
Kiwis claim Tip Top ice cream is the best in the southern hemisphere, and hokey pokey (it's a flavour) is far and away the biggest seller (five million litres annually). They're also partial to chocolate-coated marshmallow fish and pineapple lumps. You can usually buy these treats at the local dairy (milkbar).