Hello! I tried making something (Bob the Builder pre-printed fabric into a quilted cushion cover) for my little boy. Wasn't a huge success - it's hard to sew sensibly with a 2 year old on one's knee! Fortunately he's in the run-up to GCSEs and no longer does that kind of thing.
When your son gets to primary school expect lots of sewing projects because they have all sorts of excuses for costume days. I recall Humpty Dumpty, St George, Woody, WWII evacuee, Tudor, Victorian, Fantastic Mr Fox, terracotta warrior, magician's cloak, and that's before we even get to the annual Xmas show!