DS1 is 7. Always been quite tall - 75th centile or thereabouts. Had him weighed yesterday and he's 21.5 kgs - about 3st3. He's 125cm tall. I blew the dust off his red book and he weighed 20kg at 5!
Is it usual for kids to put on this little weight in 2 years? He may even have lost - I'm sure I remember him being 22kg at some stage. He has had a height growth spurt recently (and a show size spurt).