The babysitting conundrum

Leonard rubbed the bridge of his nose as he stood in the doorway of Sheldon's room. The taller man was sitting on his carpet, a pout on his face as he glared up at Leonard and Penny. Kripke had played, hat he thought was a harmless joke at the time, and had spiked one of Sheldon's yohoo's with a mind-altering drug from the chemist department.