Awww, I had a special yellow and green budgie named Sunshine who we sadly lost last year at age 11.

They LOVE millet grass/weed. You know the grassy stuff with seeds in it that you find growing in bushy area's. Just make sure it hasn't gone black because thats mouldy millet.

Oh and Sunshine used to love lettuce too. Only thing is if they eat a lot of it it can make their poo a bit runny because of the water content. But our Avian Vet said it was fine.