My boy loves crushed blackberries and other fruits in full fat Greek yoghurt. You could try that (as long as baby is ok with dairy) x
I do natural or Greek yoghurt with crushed weetabix and mashed berries! It's a favourite!
Ella's kitchen have a yummy rice pudding with mango and apple pots. It's smoother in texture to porridge, more yogurty. You could try some on your little boy, and if he likes them - then you can recreate it at home with a blender?
Does anyone have a dairy free alternative?
Weetabix is a good easy one to try