Sounds like a plan :!

An electric fence + snake ought to do it:

Definitely needs to be something either prickly or poisonous

Something like this...??

http://www.crocus.co.uk/plants/_/shrubs/buxus-sempervirens-/classid.436/

Or...

Rose Bushes? They can be quite high and prickly! Or you could do a mixture of mini conifers (or similar) along with other widish and tallish plants and flowers.

Would you not have a little wall?

Not keen on a fence, it wont fit in with the area and will look really odd.

For an idea of what im working with, this is the front of the house..



Mini conifers could work, but they will need to be close togther im guessing, and its gonna be £££

Mini conifers, ?

Picket fence would be better probably though a bit old fashioned.
What about those little fir tree things about 2 feet tall?

Right!

Im getting fucked off with the neighbours kids coming on my front garden. Kicking a football at the house and leaving there bikes laying on it.

They are only 6 or 7, and the parents are always sorry when they notice us outside, so i dont want to upset the peace.

As ive only just moved in the front garden needs a clean up and some plants etc.

Its only about 2m from the house and 3 meters wide. What sort of shrubs can i buy, that will look nice and stop them coming onto the garden?

:)