fertile brain

The synapses in his fertile brain clicked shut completing the circuit.

Free to begin work on another of the ideas spinning in his fertile brain.

Tarzan racked his fertile brain for a solution to his problem.

One of those daring plans of which he alone possessed the secret was taking shape in his fertile brain.

Their fertile little brains can conceive a hundred schemes for every one you or I may devise.

The seed that had planted itself in his fertile brain took root and began to sprout.

Meanwhile, a plan was hatching in Trinket's ever fertile brain.

Then he paused and grinned, an obviously humorous thought percolating in his fertile brain.

Lalganj is producing thousands of fertile brains every year.

What other little maggots have you got running around in that fertile brain of yours?