Ah, essentially a medikit (tm) device then?
I'd get this game if I didn't think my addictive nature would kick in... I can see myself whiling away the wee hours for weeks on end working on building the biggest/longest/widest thing ever. (nj).
I don't know what you're doing cos I haven't logged on for HOURS. But I will gladly help with whatever your project is if you figure out a way of me having an autofeeding cart mechanism for my rollercoaster at some point.