My friend's son sadly was diagnosed with a brain tumor when still a toddler and for the last few years he's been undergoing treatment. While he is, thank G-d, in remission, he still needs to go to get an MRI every month to monitor him and check if it has returned. He has also become rather obsessed with playing doctors and hospitals, so I thought it might be helpful for him to have a model hospital with a model MRI machine so he can play it out. I made this toy hospital for him earlier this year:
I needed it to be light and packable, so the majority (e.g. base and walls) are made from tri-wall cardboard, and everything is flat-pack - it packs down into 4 base pieces and 2 wall pieces (as their flat is small, and I was taking it oversea to them, in a suitcase). The furniture and figures are playmobil, the wall decorations are scrapbook paper, stickers, and images printed and mounted (e.g. room names, pictures, x-rays, clocks etc). The flooring is either felt or scrapbook paper covered in sticky back plastic.
The hardest thing was making the MRI machine. It's made with two pieces of acrylic pipe that I had them cut to size, covered with a shell of plastruct plastic (which I'd never worked with before). It was a bit of trial and error. The buttons were made with polymer clay. It works to the extent that you can lie a figure on the bed and push it in and out - I really wanted him to be able to do that because that's what he still needs to do each month.
If I did it again there's some stuff I'd do differently, but on the whole I'm pretty pleased, and also he loved it, so I'm happy.