Venomous or the tying up sort?
Bit tricky tying up a snake I'd have thought. Getting them to stay still long enough for a good granny would be difficult. Though, if you meant tying up as in dogs outside supermarkets, that would be even harder as they have no discernible neck!
And no way would I even attempt to tie up a venomous one! Far too dangerous in my opinion - make sure the Boy doesn't try it!