For a wearable item could Romeo get some glasses or goggles that translate kanji into kana for him? Preferably ones that kept the kanji there and showed the word written out in kana below it.

He loves reading and is learning kanji but they would allow him to read more complicated books and learn more!

Other things for his basket could include books! Recipe books and maybe some cooking equipment for making fancier things. Any craft things, colouring materials etc would also be loved by Romeo.