A big red button with an actual spring inside! The button can be pushed down an entire block's height.The spring is from a disposable ballpoint pen, so it's easy to acquire for anyone. Their
LEGO System MOCs with Building Instructions
LEGO MOC Big Red Truck by mla2
Find LEGO MOCs with Building Instructions
LEGO System MOCs with Building Instructions
Change Log Rebrickable - Build with LEGO
LEGO MOC Dollar Sign by willcapellaro
LEGO System MOCs with Building Instructions
LEGO System MOCs with Building Instructions
Creator MOC 73196 Red Super Mario 64 Question Mark Block - LEPIN™ Land Shop
Find LEGO MOCs with Building Instructions
LEGO System MOCs with Building Instructions
Find LEGO MOCs with Building Instructions
Lego Technic 42164 B-Model MOC
LEGO System MOCs with Building Instructions