Use a Rainbow Ropeto stop the water fall you roll over near the beginning of the stage and you'll be rewarded with a 1-Up and a few Point Stars. Continue on through the level, collecting Point Stars ...

Examine the two lava lamps behind the couch. As the lava slows, it makes the shape of a number. You're able to turn the lamp to see the number better if needed. Plug in the lamp next to the TV and use ...