Best Tyres for Fun on Grass

[butters86]

What would be the best tyres to get with sort of semi-traction for grass?
e.g. allow me to get the power down on grass but be able to do power slides, etc. At the same time I'd like be able to get reasonable power down in a straight line rather than sitting on the spot wheels spinning.

I currently have pin type tyres all round and they just grip too well. They'd be ideal for racing as it really does grip, but stops me having as much fun on grass/ they dig in and sometimes flip the car If I'm over exuberant where I'd like to be able to break traction and have some fun when "playing".

It's rear motored 2wd with a 9.5T motor and 25/80 gearing.