In 1965 LEGO released 4 Dacta sets.
Dacta was an original LEGO theme from 1960 to 2003 that deals with all things that can be used with educational facilities, such as DUPLO and TECHNIC. Dacta was later replaced by the LEGO Education theme. Sets in the Dacta product line were exclusively developed for usage in younger aged schools so the sets typically contain a large amount of pieces for playing and learning in groups. The sets were designed to contain a higher number of bricks and elements at a lower cost.
1965 LEGO Sets
1965 was a growth year for LEGO. The number of people employed by LEGO at Billund reached 600. LEGO was also increasing the pace of new development. Continued sales growth for the company also meant continued expansion of its manufacturing capacity. They also developed several new elements specifically for the North American market. Beginning this year, the primary illustration on each set's box would show only models that could be built with that set's contents. Previous sets featured generic models not necessarily possible.