Large transport buttons

Hello!

I'm setting up Reaper at a spot where absolute newcomers without prior experience in DAW's should be able to record VO by themselves. So I basically want to make it as simple as possible, and pretty much just have one large REC button and one large PLAY button, and one for rec arm.

Any suggestions how to do this? I have found no way to make the transport bigger, or to make very large buttons.

Thanks in advance

Large transport buttons