Toy Quadcopter

My toddler son always wants to play with my 'real' quadcopter multicopters. So, I thought making a toy multicopter would be a fun project that he'd enjoy playing with.
Solidworks files included for your remixing enjoyment.
1.16.14 update: increased center hole size of propellers and modified frame pegs for better snap & fit. Snap fits work well but are not "toddler rated"
1.16.14 update #2: added another option for the frame "REV2", which uses pins to attach the propellers to the frame