Girl Toys VS. Boy Toys

We currently have one boy and one girl. How do you know if you have an equal amount of girl toys and boy toys? I know it doesn't matter what child the toy was intended for - both of the kids play with all the toys that we have for them. But I think I have figured out that we definately have an adequate ratio. Here's how I know this! Today the kids were running around the house each pushing a dump truck with a baby doll in it. I just sat back and laughed!