Combination swing frame & monkey bars
You will need:
1.) 1-1/2" x 1-1/2" (38mm x 38mm) wood: 4.4m (14 1/2ft) of. If you cannot source that size, then near enough will do.
Note: You will need to round the corners of the bars with sandpaper, planer, or other, in order to make them easier on the hands of kids that grip and swing from them.
2.) 2x3 (75mm x 50mm) wood: 6 pieces @ 8ft (2.4m) long. You can upgrade to 2x4 (100mm x 50mm) if you cant obtain the former.
3.) 1x6 (150mm x 25mm) wood: 16ft (4.8m) of, allowing for a bit of waste.
4.) 5/8" (15mm) thick plywood: one piece 4ft x 4ft (1200mm x 1200mm) which is half a standard sheet.
5.) 5/16" (8mm) galvanized coach (carriage) bolts with nuts and washers: 14 @ 5" (125mm) long.
6.) 3/8" (10mm) galvanized coach (carriage) bolts with nuts and washers: 8 @ 3" (75mm) long, and 4 @ 5" (125mm) long.
Ensure the lumber is of a high quality, knot free, and suitable for exterior use.