meet the F.U.C.K.

The Free Universal Construction Kit by F.A.T. Lab and Sy-Lab is a matrix of nearly 80 adapter bricks that enable complete interoperability between ten popular children’s construction toys.
By allowing any piece to join to any other, the Kit encourages totally new forms of intercourse between otherwise closed systems—enabling radically hybrid constructive play, the creation of previously impossible designs, and ultimately, more creative opportunities for kids.
Found here. Link to video.