サーキットブロックス™ - LEDハートブロック - E-Blox®

Works perfectly with the building blocks we already had, and the LED heart is bright enough to really stand out in a dark room. Being one solid piece, it's sturdy and easy for small hands to

My kid snapped this heart block onto his existing set and it glowed right away, no extra wiring needed. The LED is surprisingly bright for such a small single piece, and he's already begging for more blocks to build around it.

The little LED heart lights up the second it snaps onto the other blocks, and my daughter figured that out on her own in about ten seconds. It's a single piece, so there's nothing to assemble, which honestly makes it the easiest part of the set to hand to a kid.