I've not gotten ANY! I've played for 26 hours and have not seen a single mushroom nor any collectibles.

I do have children.

Is this a glitch?
_________________________
Windows Vista Home Premium/Toshiba Satellite A135/Intel(R) Core(TM) 2 CPU/1.6 GHz/1014 MB Ram/DirectX10/VRAM 224 MB/1280x800(32 bit)-60 Hz Display