About this 3D model

This is a Mario based chess set I got the idea for when looking at some old Mario pajamas. For some reason I looks right on Tinkercad but the 3d file isn't letting the holes work right.This part was made with Tinkercad. Edit the part online at: https://tinkercad.com/things/0TFtOwgsGge My 3rd none quest thing to make on Tinkercad.