Review: 42072 WHACK! | Brickset: LEGO set guide and database
Lego Technic Racer Whack! set 42072; Complete W/ Instructions, No Box - See Desc | eBay
Top Brick Builder - LEGO® Technic Pull Back [42072] 135 pieces WHACK! Building Instructions | Facebook | By Top Brick Builder | LEGO® Technic Pull Back [42072] 135 pieces WHACK! Building Instructions
42072 WHACK - LEGO instructions and catalogs library
LEGO® 42072 WHACK! - ToyPro
Lego Technic combinations: beast on the left side is 42072+42073 (BASH and WHACK) while beauty on the right side is 42058+42059 (STUNT TRUCK and STUNT BIKE). : r/lego