Premack's Principle

Your structures do not untap next turn. For every X paid, gain 5 science 3 turns from now.
A more preferred activity can be used to reinforce a less preferred activity based on individuals preference
"We run laps, build cannons, save food, train hard- for we know, that a triumphant time will come when we conquer the vicious humans & malicious monkeys, and bathe in the galore of food and joy."
Excerpt from the History of the Rat Wars