We expect our children (age 7 and 5) to do their own homework. We facilitate by helping them with materials and might ask them open questions for them to consider if they want to make changes to written work but I'd say at least 95% of the work submitted is theirs.
The 5 year old has recently had a 3 week art project. He's really enjoyed doing it but as he is 5 it does look like a dogs dinner. Other mums (never the children) have been proudly bringing in their uncovered projects into school. Some have been truly amazing (jealous, moi?) and when I've asked which bit their child has done they've said things like, 'You don't think I've let her near it do you?'
So if you do their work, what do you think your child gets out of the process? What do you think the point of the homework is? Also, what do teachers think or expect from the homework?
As an aside, my mum did all of my art stuff and I won lots of competitions at primary school but I am truly hopeless at art. I don't think it taught me anything having my mum do it for me.