Beach Toys
Move SpongeBob along the blue path to the green button. Switch to Patrick and pop the first two (and only these two) beachballs, then stand on the purple button. Have SpongeBob push three beachballs along the purple paths to build a bridge to the island below.
Do not collect any Bonus Bubbles or the final Krabby Pattie yet! First, roll the beachball along the red arrow, then follow the same path with the remaining two balls. Now collect all Bonus Bubbles and the Krabby Pattie.