Duplo Brick 2 x 2 with '3' Print

Reference

3437pr0035

BrickLink® #

3437pb060

Duplo Brick 2 x 2 with '3' Print (part 3437pr0035) is a LEGO element. CollectORbuild's catalog records it in 10 sets, including All-in-One-Box-of-Fun and All-in-One-Pink-Box-of-Fun.