A.Drop the marble down the steps

B.Through the curved tube

C.Drop the ball on the ramp

D.It falls into the funnel and spins

E.Goes down the tube

F.Drops out on ramp and around the curve

G.Rolls down the long ramp

H.Both balls jump into the cup

I.You pull on the string and the pulley lifts the cup

J.The cup dumps over into the plastic boat

K.The balls fall down into the mousetrap