When the packaged arrived I called my 3 year old over to give him his new surprise and he has been wearing them since! Very easy for him to put on and take off on his own.  Its great that the liner comes off and they double as rain boots.  I did order a size up, hes a 10 - I ordered an 11, thinking about the thickness of the socks, however with the liner they have I don't think he will need to double up or use very thick socks. Great buy!! I highly recommend.  Ohh...and I didn't notice the strong pvc odor some have posted about.