Fred reverts to childhood after getting hit on the head with a bowling ball. After looking for a doctor, Barney finds a mad scientist that uses electric shock to swap personalities.

Fred begins inventing again and creates a reducing formula called "Fred-O-Cal" to take off weight. This formula winds up shrinking Fred to less than a foot tall.

Fred makes arrangements for Pebbles' first birthday and the Water Buffalo Lodge parties. Trouble ensues when the only caterer in town muddles the parties, including sending a clown to the Water Buffalo Lodge and dancing girls to Pebbles' birthday party, and Fred gets blamed for it.