Pedals for 10 year old

Have a pedal dilemma. Eldest Cursing (10 years) is not happy with his pedals. Has some generic flats that were heavy, slippy and generally crap. I switched these for a set of Nukeproof Electron. After a few rides he now has Pizza shins from the inevitable. They are also a bit big for his size 3 feet.

Are there any suggestions for a light,smaller cage, reasonably grippy pedal without the post ride telling off from SWMBO?

Was looking at a pair of these, really not sure if they would be grippy enough. Anyone got any experience of these…

http://www.chainreactioncycles.com/au/en/wellgo-cnc-m138-flat-pedals/rp-prod52882

These are pretty good – a reasonable compromise as they have pins and decent grip, but they aren’t too vicious. And they are cheap!