I have created a cut list you can follow if you like. All the pieces apart from the Yellow & Green pieces are 18mm plywood. The Yellow piece is 12mm MDF and the Green piece is 6mm Hardboard. Of course this can be adapted to suit any size or design you want.

To cut the rectangle pieces I used my table saw to rip them to width and then my mitre saw to cut them to length.

Although these tools definitely make the task easier they are the only way to get the job done. You could use a variety of different tools. You could use a band saw, jigsaw, circular saw and even a hand saw if you want a work out.

To create the arch section I laid out the design using my cut list as a guide and then cut it out using a jigsaw. Again any way you wish to achieve this will of course work.

Once all the pieces are cut make sure to sand and round over the edges. You don't want any sharp corners that children could hurt themselves on.