I know, my textures stink! Anyway i'm starting to clean them up. In the pic you can see that i made my own trampoline texture, using crisscrossing chains was too much (glad you mentioned that because it got me to make a better tex

). I also pointed the texture on the trampoline to the center all the way around, taking away that sloppy sketchup texture splash look. I made it so that the sides of the sandbox go out which makes it easier to get into. The tires will be a bit of work to texture properly but they need to most help

. I'll try to use the textures from some kart like you suggested. That would take care of the last visual eyesore in the arena.