When Gertie arrives at Henry's house, Henry thinks she came for a playdate but she actually just came over for a piano lesson with her piano teacher, Momma! So, Henry must figure out how to pass the time – quietly – while waiting for Gertie to finish her piano lesson with Momma. / Cobby makes it his personal mission to help Henry conquer his fear of the Monster Wave Pool so he can try surfing for the very first time.