most 3 year olds think that they can completely hide by covering their face with their hands, that putting on 23 hairclips makes them pretty, that they can be a policeman with his own train (ok that last one might just have been mine, lol)
I wouldn't tell one that none of them are true either...
most 3 year olds don't have any problem believing that santa gets round by magic and definitely don't notice how much they have in comparison to other children
I wouldn't lie to my children about anything important, but it's not hypocritical to do something to create something nice for them
I lie to them all the time - ooh isn't that a lovely picture! (wtf is it supposed to be? am I even holding it the right way up?)
no, there's no tomatoes in the spaghetti bolognaise (tinned doesn't count because you can't see bits)
You can grow up to be whatever you want to be (ok an international rockstar a vet and a shop owner all at once seem a bit unlikely)
I don't see that Santa is any different? Yes as they get older and question things I'd answer differently, just like I'm not going to go along with my 14 year old picking exam choices based on being the train driving policeman he wanted to be as a 3 year old, rofl