3 6 months introduce baby to toy showing him how the features rattle and crinkle 4 8 months let your child explore the cubes various features independently and flip the cube from one side to the other 6 8 months play peek a boo with your baby and enjoy the toy together 9 12 months let baby enjoy the soft cubes more advanced features trying to pull the inner cube out and put it back in place using the loop to close the cube etc features a versatile flip sided baby toy that include