I'm a TA, and echo PP's to say that our role is significantly bigger/more complex than most parents believe.
I'm in at least 30m before I'm scheduled to start each morning, and stay at least 30m after I'm supposed to finish so I can plan/mark my interventions. I run after school sport clubs twice a week, I run speech and language sessions, take a phonics group every morning, support the less able learners in every lesson (usually groups of 8-10, all of whom need differing levels of support), run handwriting boosters, run maths intervention groups three times a week and literacy interventions twice a week during assemblies, I'm on duty every break time and every lunchtime, administer first aid, am our class pastoral support... the list goes on. This is all in addition to the reading books/homework/photocopying/displays etc that people seem to think make up the whole of our job.
I don't expect presents, though those I receive are always much appreciated. I do, however, find posts insisting that TAs have no impact on children, or aren't important, incredibly demoralising.
This year, a boy in my class drew me a picture of Santa, with a message to say: "To Mrs Callisto, you help me a lot and give the best cuddles. I love you lots. From Name". That meant more to me than any amount of chocolates or wine!