The Activity Club and the House of Frost

"What do you call it when it's pouring ducks and geese?" you say.

"Fowl weather!" comes the response.

The walls widen fully, and Isaac and King C become fully un-squished. Isaac spits out a few bits of fluff from his mouth, gets up and walks over to you. However, when he puts out a hand, the barrier is still up. One more joke answer appears.

"A rain-bow."

Choose the final question.