One trick that we used to use when DS was a bit fussy (he isn't normally a fussy kid). We used to sit a favourite teddy at the table and it would be one spoon for teddy, one for DS. For some reason that always used to make him eat. I think it is because he then feels a little bit of responsibility in them eating as well, or the competition factor. Always worked though and worth a try as if it doesn't work then you haven't really pushed the issue either to cause them to back track.