What are the scissors used for?

Reducing the level of an item. If you have bread item 5 and need 4, the scissors will reduce to level 4.

Speed up the generators of items like the dog house to produce dogs or the fruit tree to produce fruit

If you use the scissors on the orange tree level 8 you will get 2 level 7 trees immediately and will get more oranges than you do from one level 8 tree. Then when you merge it again you will get more oranges immediately. You can use this if you want to make a cake faster.