Expensive toys do nothing for my kids. I have spent a lot of money on toys and they don't play with them for more than a week before they get bored with them. Toys can only be one thing, but a cardboard box is a mine of ideas. It let's their imagination run wild.
Boxes can be boats, cars, beds for dolls, TVs...the possibilities are endless! Just give them a cardboard box and some markers and see what their little minds can come up with. This box kept all three kids busy for over 3hours!