Tough lawn

I want to create a lawn area for my children to play so need to create a tough lawn. the area is currently half covered in grass but there are areas that have concrete slabs on which will be removed. I also have about 10 tonns of clay soil that is going t be spread over the area this also contains a lot of small stones. Any suggestions welcome

Having a good lawn depends much on how you fertilize it.

I have friends who have a great lawn and they use no artifical fertilizers or herbisides.
they use one product that they swear by... made my natural guard and available in some nurseries

What it does is supply the soil with micro-organisms... thats it. nothing else

they use it on their large garden also... they do not compost or do anything else to feed their soil
and I couldn't help but notice their great corn crop, planted in the same spot year after year
with no nitrogens added to the soil. Seems these microorganisms really help the plants to get what they need.

I used a Grass seed that I got from Agway that was meant for high traffic and playgrounds, it seemed to hold up well and looks fine.

Or, try NoMowGrass.com
Uses include lawns for low to no mowing, less watering and no chemicals. Also a great traffic area like parking lots and woodland paths, openings.