Jumbo Bricks was a small theme exclusively manufactured by Samsonite from 1964 to 1972. The sets contained bricks larger than the normal system bricks, much the same as today's DUPLO bricks. However, unlike DUPLO, Jumbo Bricks are not to a relative scale to standard LEGO bricks. They were marketed towards children from nursery school through to first grade. There were six sets produced for this theme.
1968 LEGO Sets
1968 LEGO began phasing in yet another box design. This new design consisted entirely of “idea book”-like images on the front and back. The now familiar LEGO logo was relegated to the side of the box. In many ways it was similar to the box design used by Samsonite for several years. This was a transition year for LEGO with its change ion the new scaling we saw a number of Basic sets adapting this modern scale and older sets with smaller scales being phased out.