The EverBlock System allows adults to transform LEGO-building skills into bigger projects. There are 4 different blocks, and 5 accessory pieces. Prices range from $3.95 to $7.25 per item (depending on its size), but there are bulk packs with better deals for more serious “architects”. The whole system is modular, which means that builders start with as many blocks as they need and can later add more fully knowing that everything will connect perfectly. EverBlock is great for designing office spaces, furniture, and other projects, and they even have a design library to spark people’s imagination.