We spent the weekend at my parents' house where my mom has painstakingly gone through my brother's (now vintage) Matchbox and Hot Wheels car collection to find all of the ones with opening doors, hoods, trunks and sunroofs and polished them off for the child. Needless to say, he's in hog heaven at Gamma's house (and not for this reason alone - where else does he get undivided attention and all the juice he can drink?). After I grew bored of endless trips down the car ramp and mini 50-car pile-ups, I made us a little car rainbow.
PS: It seems you can't get a modern day Matchbox car with opening doors anymore - where's the fun in that?!