I have to dito what heliTb said.....
I used plastic blades to learn tail in hover, they are indestructable however in any major blade strike you will trash stuff in your head. I broke 5 blade grips, bent 2 mainshafts, & bend my feathering spindle twice...also after a while the center hub & rotor head were pretty hammered too(alot of twist play in them). Oh and 3 booms strikes also. All within a my first few hours. Blades were still in great shape though.... I dont know how many sets of wood blades I would have ruined but I only fly them now and they will take a bit of a whack without being totally ruined... and some pretty badly smacked ones can be made to fly nice again if you doctor them up & get them balanced out real nice again.
I would advise to get some $8 blades that heliTB recomended and learn to dotor them up and balance them well. You will keep your heli flying better this way....I didnt realize the other damage that was happening to mine(bent spindle and mainshafts) and was try to fly a wounded bird alot, which doesnt fly right.
You may just want to go for the carbons if you are rarely crashing and just nicking the blades on stuff these days, I hear they are pretty durable, havent flow them myself.