Kids in the past used to play together. They'd either play at one friend's house or play together in a neutral location. They brought along some toys and had quite some fun playing with toys that weren't theirs. This, however changed as people became more protective. Your next door neighbor could be a psycho but if you have but if they have kids of their own, it could be that they aren't as bad you think they are. So if you have a good neighbor and your kids get along would it be a good idea to buy toys together since all your kids will be playing with them? You could even get bulk discounts if you decide to buy lots of toys at one go.