Phil and Keely are hired to baby sit Mr. Messerschmitt’s nephew, Nathan, at Phil’s house, though his dad won’t be there to supervise. Phil promises not to use any futuristic gadgets to aid him in baby sitting, though Nathan proves too much for them to handle, so Phil discovers a loophole and has Keely
use the WIZRD to make Nathan more mature, but she uses it too much and makes him like a grown man. While trying to reverse it, she accidentally hits Phil, so instead of making Nathan back to normal, she makes Phil believe he’s five years old.
Meanwhile, Pim makes volcanoes for the science fair which she attempts to sell to her peers who don’t want to make their own.