How To Build A Wood Swing Set With Picxtures I Am Trying To Build A Swing Set?

I am trying to build a swing set? - how to build a wood swing set with picxtures

the directions say I need
2 child
2 deals H4 pine logs (Poland), 3.2 m long, 125 mm long
Pine 150mm x75mm (width) covered 2.8 m long
2 bags of premixed concrete
4 x 200 mm with nut, bolt and washer, galvanized
4 x 175mm x 10mm stainless steel eyebolts
4 x 10 mm galvanized shackless
So my question is, when I go shopping, as I say, I'm glad, because I know nothing about wood, 2 x H4 treated pine logs request (Poland), 3.2 m long 125mm long? o How can I