Our BibiBaby Pyramid Stacker doubles as a skill building too and a teether - great value! The six engaging coloured pieces connect easily to help develop hand-eye coordination and fine motor skills while providing hours off fun and entertainment They are produced from 100% food grade silicone, making them the perfect teether as well. Place them in the fridge or freezer prior to use. You’ll love watching your baby add stacking and building to ever growing their skill set!