Childrens Construction type Toys (Somerset .)

I work at a Primary School in Chard Xmas a Caretaker and one of the teachers is setting up an outside area for the children starting next year and had an idea of doing a d.i.y construction area with workbenches and tools (I think they are plastic ) hardhats and uniforms and large ride on tractors ,diggers etc .
If anyone has anything like this I can pass onto her we would be most grateful and am sure the children will be happy also
Many Thanks