any cool book or toy or gadget to practice letter formation/writing??

[bumbly]

that would work with a relunctant boy who hates colouring in...he can write his name but for example starts the letters in the wrong way....

[ExpectoPatronum]

The best thing I ever got for my boys was a whiteboard, dry wipe markers and a cloth. They write things on it, play hangman, draw - and I think they like the fact that if something goes badly wrong, it can be obliterated in seconds!

[inmysparetime]

Playground chalks can help, as he might need to refine his gross motor skills before fine motor skills can be perfected.