B and Q had some budget range black plastic trowels and forks that my nephews are using after they trashed the "kids" tools they got, I was very disapointed in the kids stuff they were not fit for purpose.
the b and q budget ones are not the best tools in the world but I think they will last them another year or two till their hands are big enough for grown up tools.
They do see mimi versions of grown up tools on some websites but they are very expensive and I dont think its worth the cost.

__________________
Yo an' Bob
Walk lightly on the earth
take only what you need
give all you can
and your produce will be bountifull