In 1956, LEGO released 24 sets across 2 themes, all of these sets have been retired. For that year, the total price of all retail sets cost $53, today those sets are valued around $24,713.
Most valuable 1956 LEGO set
700-5-2 Gift Package $4,119.21
Largest 1956 LEGO set
700-0 Town Plan System 264 pieces
Most owned 1956 set
231-2 Esso Pumps and Sign
1956 refined Mursten and System i Leg with simplified windows and doors and expanded into more accessory sets (e.g., filling stations, vehicles) across Scandinavia.
24 sets

224 2x2 & 2x4 Curved Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1956
Pieces 14
Availability Retired
224 LEGO 2x2 & 2x4 Curved Bricks
Retail $0.50

231-2 Esso Pumps and Sign

Theme / Subtheme System i Leg / Supplemental
Year 1956
Pieces 2
Availability Retired
231-2 LEGO Esso Pumps and Sign
Retail $0.50
Value $131.78
Growth  +26256.0%
Annual growth 7.2%

236 Garage with Automatic Door

Theme / Subtheme System i Leg / Town Plan
Year 1956
Pieces 69
Availability Retired
236 LEGO Garage with Automatic Door
Retail $3.25
Value $376.83
Growth  +11494.8%
Annual growth 7.0%

250-2 1:87 Esso Bedford Tanker

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1956
Availability Retired
250-2 LEGO 1:87 Esso Bedford Tanker
Retail $1.15
Value $282.32
Growth  +24449.6%
Annual growth 8.2%

251-2 1:87 Esso Bedford Truck

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1956
Availability Retired
251-2 LEGO 1:87 Esso Bedford Truck
Retail $1.95
Value $260.34
Growth  +13250.8%
Annual growth 7.2%

252-2 1:87 Esso Bedford Trailer

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1956
Availability Retired
252-2 LEGO 1:87 Esso Bedford Trailer
Retail $0.70

275-2 1:87 VW Van

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1956
Availability Retired
275-2 LEGO 1:87 VW Van
Retail $0.70
Value $389.03
Growth  +55475.7%
Annual growth 8.9%

700-0 Town Plan System

Theme / Subtheme System i Leg / Town Plan
Year 1956
Pieces 264
Availability Retired
700-0 LEGO Town Plan System
Retail $12.50
Value $3,738.03
Growth  +29804.2%
Annual growth 8.5%

700-2-1 Gift Package

Theme / Subtheme Mursten / Basic Set
Year 1956
Availability Retired
700-2-1 LEGO Gift Package
Retail $3.50

700-2-3 Gift Package

Theme / Subtheme Mursten / Basic Set
Year 1956
Availability Retired
700-2-3 LEGO Gift Package
Retail $3.25

700-3-2 Gift Package

Theme / Subtheme Mursten / Basic Set
Year 1956
Availability Retired
700-3-2 LEGO Gift Package
Retail $2.50
Value $3,524.26
Growth  +140870.4%
Annual growth 10.9%

700-3A-2 Gift Package

Theme / Subtheme Mursten / Town Plan
Year 1956
Availability Retired
700-3A-2 LEGO Gift Package
Retail $3.25
Value $2,141.97
Growth  +65806.8%
Annual growth 9.7%

700-4-3 Gift Package

Theme / Subtheme Mursten / Basic Set
Year 1956
Availability Retired
700-4-3 LEGO Gift Package
Retail $1.50
Value $2,842.09
Growth  +189372.7%
Annual growth 11.4%

700-5-2 Gift Package

Theme / Subtheme Mursten / Basic Set
Year 1956
Availability Retired
700-5-2 LEGO Gift Package
Retail $1.25
Value $4,119.21
Growth  +329436.8%
Annual growth 12.3%

700-6-2 Gift Package

Theme / Subtheme Mursten / Town Plan
Year 1956
Pieces 46
Availability Retired
700-6-2 LEGO Gift Package
Retail $2.25
Value $2,527.75
Growth  +112244.4%
Annual growth 10.6%

1200-2 Town Plan Board Small Plastic

Theme / Subtheme System i Leg / Town Plan
Year 1956
Pieces 1
Availability Retired
1200-2 LEGO Town Plan Board Small Plastic
Retail $4.00
Value $308.73
Growth  +7618.3%
Annual growth 6.4%

1226-2 6x8 & 2x8 Plates

Theme / Subtheme System i Leg / Supplemental
Year 1956
Pieces 4
Availability Retired
1226-2 LEGO 6x8 & 2x8 Plates
Retail $0.50

1227-2 4x8 & 2x8 Plates

Theme / Subtheme System i Leg / Supplemental
Year 1956
Pieces 5
Availability Retired
1227-2 LEGO 4x8 & 2x8 Plates
Retail $0.50

1228-2 4x8 Curved & 2x8 Plates

Theme / Subtheme System i Leg / Supplemental
Year 1956
Pieces 6
Availability Retired
1228-2 LEGO 4x8 Curved & 2x8 Plates
Retail $0.50

1231-2 Red Windows and Door with Glass

Theme / Subtheme System i Leg / Supplemental
Year 1956
Pieces 10
Availability Retired
1231-2 LEGO Red Windows and Door with Glass
Retail $1.00
Value $2.06
Growth  +106.0%
Annual growth 1.3%

1231-3 White Windows and Door with Glass

Theme / Subtheme System i Leg / Supplemental
Year 1956
Pieces 10
Availability Retired
1231-3 LEGO White Windows and Door with Glass
Retail $1.00
Value $2.06
Growth  +106.0%
Annual growth 1.3%

1270 5 Cyclists / Motorcyclists

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1956
Pieces 5
Availability Retired
1270 LEGO 5 Cyclists / Motorcyclists
Retail $2.00
Value $328.19
Growth  +16309.5%
Annual growth 7.6%

1271-2 Traffic Police Set

Theme / Subtheme System i Leg / Town Plan
Year 1956
Pieces 6
Availability Retired
1271-2 LEGO Traffic Police Set
Retail $1.25
Value $224.10
Growth  +17828.0%
Annual growth 7.7%

1310 ESSO Filling Station

Theme / Subtheme System i Leg / Town Plan
Year 1956
Pieces 96
Availability Retired
1310 LEGO ESSO Filling Station
Retail $3.75
Value $3,514.72
Growth  +93625.9%
Annual growth 10.3%