Straight from the prohibited items lady at the CBSA:
"Training" Butterfly knives with a completely dulled edge are legal to import. I.e. a Balisong training knife used to practice all sorts of fun moves. The Filipino community launched an appeal to the law totally outlawing them totally on the basis that the Balisong was an important part of their culture. They won.
Have fun! Just try and find the appropriate D-memo as proof if you need to appeal a decision made by customs at the border.
|: Gaudeamus igitur, Juvenes dum sumus :|
Post iucundam iuventutem, Post molestam senectutem
|: Nos habebit humus! :|
Raug, draugi, kā šī kanna mirdz, kā puto alutiņš? Dievs zin, cik ilgi līksmo sirds, lai baudām drīz!