This small quadricopter is 100% printed in pla, but ABS may be good too .
https://www.youtube.com/watch?v=2lu-H9PnjOY&feature=em-upload_owner#action=share
To make it fly you need :
motors smaller than usualy used : http://www.hobbyking.com/hobbyking/store/__39033__Turnigy_Multistar_1704_1900Kv_12Pole_Multi_Rotor_Outrunner.html

5' triblade prop

Esc smal enought to but the i the arms :
http://www.hobbyking.com/hobbyking/store/__4318__TURNIGY_Plush_6A_8bec_6g_Speed_Controller.html

Stabilisation board, smal enought too :
http://www.hobbyking.com/hobbyking/store/__22322__MultiWii_NanoWii_ATmega32U4_Micro_Flight_Controller_USB_GYRO_ACC.html
or
http://www.hobbyking.com/hobbyking/store/__42250__MINI_MWC_Flight_Control_Board_and_DSM2_Receiver_ACC_GYRO_BARO_MAG.html

Lipo 2S 450 mah

It mus be printed with 100% infill, with support for the main part.