I recommend giving a stage 1 eater a thinner version, but if your baby is ready for stage 2 or above, you can simply combine blueberry puree with yogurt, oatmeal or even rice cereal. You can also blend it with banana, avocado or another thicker puree. Another option is to simmer fresh blueberries over medium heat until they burst and start to thicken, then puree them. This will result in a thicker, sweeter puree.