You know I throw those shelled peanuts away that come in seed mixes, I just don't want to take the chance, if you think he likes to rip the nut out of the shell you can always come up with some way to make him work for his peanuts, you can hide them in things, like paper liners for cupcake pans then twist them shut and put them where he can find them and find his way to the nut, lots of ideas in the toys and playstand room.
They all like to flap their wings especially when they are out of the cage where they have plenty of room to flap to their hearts content.