I do wish they'd mention the music and inspiration in the credits. S1E17 (Calypso) is built around Camille Saint-Saens' "Organ Symphony" 4th movement. S1E1 (The Magic Xylophone) is based on Mozart's "Rondo Alla Turca". S1E11 (Bike) is derived from Beethoven's Symphony no. 9 4th movement (a.k.a. Ode to Joy). And the original music is awesome.