The Lego set Kai Fighter with the set number 70721 is part of the LEGO NINJAGO theme and is recommended for ages 8 - 14. It was released in 2014. It includes 2 minifigures. The model has 196 pieces, and we estimate it takes around < 1 hour to build. 40 Brickfact users have this set in their collection.
The set weighs about 0.350 kg. The box measures 10.3 x 7.5 x 2.4 in (26.2 x 19.1 x 6.1 cm). The recommended retail price is $19.99.
The Part-Out-Value (POV) is the sum of the average prices paid on bricklink.com for all parts of this set. It is about $57.42.
Lego 70721 product data
Set Information
Availability
Release
2014
Retiring Status
Retired
Price Information
RRP
$19.99
Insiders Points (for purchase at Lego)
130
Part Out Value
$57.42
Packaging
Weight
0.350 kg
Packaging dimensions
10.3 x 7.5 x 2.4 in
EAN (GTIN13)
5702015121064
Popularity with Brickfact users
- users have this set
- 40
- buyers in the last 12 months
- 11
40 Brickfact users have Kai Fighter in their collection. 11 users bought it in the last 12 months.
Based on anonymized Brickfact user collections; shown only for sets with at least 10 users. As of October 25, 2026.
LEGO 70721 price trend
Average sale price on secondary marketplaces – not the new price at retailers.
- Current market value
- $68.18
- Growth vs. RRP
- +241 % $19.99
- Range
- $67.99 – $68.53
- Average
- $68.19
Loading price history…
Minifigures from 70721 Kai Fighter
The Kai Fighter set includes 2 different minifigures, 0 of which are unique to this set. The combined value of the minifigures is $17.46, which is ~87% of the RRP of this set.
x1
Kai
NINJAGO
2014
#njo091
$4.27
i
2 sets
x1
General Cryptor
NINJAGO
2014
#njo092
$13.19
3 sets
Building Instruction for LEGO 70721 Kai Fighter
Part Lists for LEGO 70721 Kai Fighter
LEGO 70721 Frequently Asked Questions
Is LEGO 70721 still available?
LEGO has retired 70721 Kai Fighter, and no retailer in our price comparison currently sells it new. Its market value on secondary marketplaces is $68.18.
