A Portrait of the Artist as a Young Tibble

The Portrait of the Artist as a Young Tibble is the first half of the 7th episode of Season 13. It first aired on April 6, 2010 with The Secret Guardians.

Summary
Tommy and Timmy want to get a monster toy house, but have to pay for it themselves. They try many ways to earn money and they settle on painting. They begin by making paintings that nobody wants to buy and cry when the customer doesn't want the painting. This strategy guilts many people into buying their painting until they encounter Grandma Thora -- and she's not falling for their trick. Will they be able to make a perfect painting just for her?