Big croc, little croc

I got these adorable wee Crocs for Mack today in TK Maxx. He was stomping around in them this afternoon. I wonder if he will keep them on any better than he keeps on his normal shoes.

The big ones are for Kerr. They were half price in the Next sale last summer. They are still a bit big for him so I'm hoping his feet grow a bit before the summer or they will end up fitting him next winter which would defeat the point of getting a bargain!